lens - Cameracraft

Sony 28-75mm f/2.8 SAM on mirrorless FF

Posted on April 15, 2016 By David Kilpatrick

With the 24-70mm f/2.8 new Sony GM FE lens selling for £1799 (UK) and the A-mount version two 24-70mm f/2.8 for a full £100 more, the cost of a basic mid-range zoom to use with a camera like the A7RII remains very high. There are good arguments to be happy with the 24-70mm f/4 FE zoom, or even the 28-70mm f/3.5-5.6 though that is best limited to use on the A7 (24 megapixel) and A7S (12 megapixel) bodies rather than the A7R (36 megapixel) or A7RII (42 megapixel).

Of course there are good lens adaptors out there and 24-70mm f/2.8 lenses from Canon, Tamron or Sigma with ultrasonic focus drive in Canon EF mount offer one solution. The original 24-70mm f/2.8 for A-mount with its SSM motor of this type can also be found for a fair price. But there’s one lens which I sold after my A7R arrived, mostly because I was parting company with my full-frame A-mount body survivors. It’s the Tamron-based but Sony revised SAL 28-75mm f/2.8 SAM.

Although I did have an LA-EA3 adaptor to use SSM and SAM drive A-mount lenses on the E-mount bodies, the 28-75mm didn’t really work very well on the A7R so it remained on my A99 or A900. I made a few tests and saw that it was certainly OK on 36 megapixels, though even on the 24 megapixel A99 where it played nicely with the AF system it had slightly soft corners when used wide open. They were not any softer than the 24-70mm f/2.8 Carl Zeiss of that time and in some ways the lens was better behaved.

The first thing to do was to fix this lens to the LA-EA3 creating an FE lens unit. Imagine the adaptor is just part of the lens (that’s pretty much how Sony makes many lenses for E-mount anyway). The total unit measures up at 115mm long including the adaptor, and 75mm diameter taking 67mm filters. The lens itself weighs only 565g, the combo weighs 683g with adaptor and lens hood. That compares with the new GM lens at 136mm long and 88mm diameter using 82mm filters and weighing 886g. As I already have a 16-35mm f/4 CZ which covers the 24mm requirement well, the 28-75mm range is just as useful to me as 24-70mm.

While the 28-75mm SAM activates PDAF and multiple AF points, it’s not the full works with tracking and Eye-AF. But it’s also not as noisy as some reviews imply. It’s much quieter than the 85mm f/2.8 SAM, and silent compared to the grinding focus of the 30mm DT SAM macro. Startup is fast, with the lens initialising quicker than FE mount stabilised zooms. The aperture actuation is slicker than with body-drive SAL lenses on the LA-EA4, and quieter. Focus is fast and the only downside is the rotating focus ring which does not support DMF or over-ride on the fly, or auto manual focus magnification. Manual focus requires you to set it on the lens and the body, and whatever you are doing, you need to avoid either turning the focus ring when there is any resistance, or blocking it from turning during AF. It’s a bit vulnerable and the direction of focus is the opposite to normal Sony/Minolta design. The zoom ring which locks at 28mm only operates in the normal direction.

So, what you get with the LA-EA3+28-75mm SAM is basic but fully controlled and communicating, EXIF accurate with profile correctly invoked. It will track with continuous focus and during movies, though slightly noisy for in-camera sound recording; it seems to do so when some SSM lenses, like the 24mm f/2 CZ, don’t play.

As for optical quality, it’s still a 14-year-old Tamron in disguise, but it can match up to 42 megapixels centrally across its full range. The performance over the APS-C image area is superb, even wide open at all focal lengths, with just a hint of misty aberrations slightly masking a super-sharp result on axis. On full frame, a marked ‘cap shape’ deviation from flat field towards the extremes causes strong softening on flat subjects and landscapes at 28mm and is not entirely removed at longer lengths. You would not want to use this at 50mm and f/2.8 if you had a faster 50mm you could fit and stop down to f/2.8. On real three-dimensional subjects at typical working apertures between f/4 and f/11 it can be extremely sharp. The respectable 38cm close focus and 0.22X subject scale (not as good as the new Sony GM 24-70mm) reveal microscopic detail on the A7RII at f/5.6. The shot below is at the closest AF on the large water drop in the centre, at 75mm and f/5.6 – you can see the bokeh is very acceptable, not complex or ‘nervous’ which it tends to be when used wide open for more distant subjects with a slightly defocused background.

A 100% crop from th A7RII file (converted from raw ISO 500 14-bit, without any sharpening for web and with minimal NR) gives an idea how good this lens is and also just how little depth of field you’re ever going to see from a 42 megapixel full frame image used this way!

It would hardly be worth buying an LA-EA3 and a new 28-75mm just to save about £1000 over the GM 24-70mm. If you already own an LA-EA3 and you can find a cut price or good used 28-75mm go for it. The way its aperture works means you’ll get very fast low light focus and minimal shutter lag (but you do need a mark II A7 series body to get the best functioning).

The zoom action is a real pleasure to use, very light but positive, and the overall build and feel of the lens will not disappoint. It also seems to get just the right response from the in-body stabilisation of the A7RII. Sure, 67mm filters may be smaller than many midrange zooms require, but I will either have to use a stepping ring or get a couple of new filters – not cheap, for the quality needed to maintain the lens performance. Also, it’s not weatherproofed.

Here’s a quick set of three hand held (with SSI) comparisons at 28mm – f/2.8, f/5.6 and f/9. I’ve loaded these up at full size so they should open the original Level 10 sRGB JPEG when clicked. The focus in on the foreground railing spike and the fine spider web gives the best idea of how the resolution and contrast of the lens improve from wide open. It’s clearly resolved at f/2.8 but with a gentle ‘glow’ at pixel level. First image – f/2.8.

Second image – f/5.6. If you download all three images and load them into Photoshop, it’s interesting to switch between tabs and see the depth of field change.

The third image is at f/9 and here the ISO is high at 2000. The A7RII can produce great results up to 3200 but I might not choose to have this at 2000. Even so, the sharpness can be judged without problems as the noise doesn’t have much effect on fine detail with current Sony sensors and processing. It always shows more in defocused, smooth areas.

Because I use other lenses – such as the 24-105mm f/3.5-4.5 Sony and 50mm f/2.8 Macro Sony on LA-EA4, 40mm f/2.8 Canon STM, Sony FE 28mm f/2, 16-35mm CZ f/4 and also the unrivalled 24-240mm FE zoom I have many choices overlapping the range of this lens. I remember that for landscape work on the A900 it was hard to beat. Here’s one of my images from that combination, using a 6 second exposure at 40mm focal length, f/8 and ISO 100 with a variable ND filter. With the restrictions on tripod position given by the location, the zoom range of 28-75mm proved just right for a range of studies.

With this lens arriving during a period (for my corner of the UK) of sustained white skies and drizzling rain, it’s not been out and about much. One thing it has done is to focus very well in dim room lighting on my sofa companions –

And, for those who don’t think f/4 is wide enough and desperately want 55mm f/1.8 or f/0.95 lenses, this is at 55mm f/2.8 and of course when the iris of the eye is sharp the fur around it is not and Willow’s nose is blurred. Once again, despite correction for tungsten light at the extreme limit of Adobe Camera Raw, and using ISO 3200, it’s pretty amazing what the A7RII can do seen at 100% (below).

But this super-shallow depth of field is what happens at 42 megapixels. Depth of field used to be worked out based on a 10 x 8″ print held in your hand, not a 6 x 4ft image viewed through the ‘window’ of a screen. Of course for social media you do indeed need very wide apertures because when your pictures are mostly viewed on smartphones, it’s like looking at a contact print from a Vest Pocket Kodak…

To support Photoclubalpha, subscribe to f2 Cameracraft (it’s probably the only photo mag edited by two long-standing Sony system users, myself and Gary Friedman).

– David Kilpatrick

You can find deals for the Sony SAL 28-75mm f/2.8 SAM A-mount lens at B&H Photographic, Wex Photographic for the UK, or Amazon Sony SAL2875 Alpha 28-75mm F2.8 Standard Zoom Lens

DK's ramblings, Equipment Reviews, Lenses - Alpha Mount, NEX System

The best 50mm for A7RII

Posted on March 28, 2016 By David Kilpatrick

After testing the Sony Carl Zeiss 55mm f/1.8 FE in 2014, I was less than impressed. I may have had a decentred example (it happened to dPreview and at least one photographer I trust to know his lens performance expectations). It was, certainly, pin-sharp on a test chart or a brick wall but the moment three-dimensional subjects were involved at wide aperture the defocused detail could be very untidy. The clip below from trees behind a building which was sharply focused is at f/1.8 and 1/2500th (a suggestion that it could be caused by camera shake is easily ruled out). See my additional notes at the end!

cz55mm1p8distance

It’s worth saying that when I had this lens I made some tests of the bokeh using very strong defocus which looked good. Many examples I’ve seen, which true believers put forward, show a figure (from full length to portrait) centre of a horizontal frame at f/1.8 with a pleasant enough looking distant background. My gripe has been with what happens when your subject is further away, or the background is not all very distant. This is an expensive lens but it seems to me to have fussy bokeh with too much CA fringe and also more focus-related colour shift than desirable.

Here is a full size example with EXIF. Honestly, the best standard lens around? //www.pbase.com/davidkilpatrick/image/162847304

Now I’ve got a fair collection of 50, 55 and 58mm lenses and also the little Canon 40mm f/2.8 STM which is my alternative to having a 35mm and a 55mm. No matter what the lens – Pentax, Minolta, Sony 50mm f/1.4, Helios, Zenitar, Nikon, CZ Jena – the full aperture between f/2 and f/1.4 always proves to be a touch soft. They all have residual aberrations that the CZ 55mm f/1.8 design has eliminated. While they can have a smoother bokeh, they also have marked colour shifts and uncorrected CA. Generally, they also all perform extremely well once stopped down to f/8 and most designs are great by f/4.

Despite the advantage of full AF functions, the CZ 55mm does not have a particularly good close focus or maximum image scale. In use I often found myself framing up closer than 50cm. That’s half a metre – it’s even further than the old 55 and 58mm lenses of the 1960s, which generally manage 45cm. I find this limitation hard to understand. 50 years ago CZ Jena started to put helicoids on their standard 50mm lenses which enabled focus down to 35cm. We have gone backwards since then.

And then I realised I’ve already got a lens which is free from all vices, gives me AF and manual focus options using adaptors I already own, which cost me about a third of the price of a CZ 55mm – and I was not being used on my A7RII. We bought a good used example of the Sony SAL 50mm f/2.8 Macro to use with our Alpha DSLR.

First of all, I compared this with the idea of buying a Zeiss Loxia 50mm f/2, by fitting it to the LA-EA3. Although the focusing ring does not communicate to the camera to invoke magnified manual focus, the lens has a Focus Hold button which can be set to this. The focusing throw is steep but in practice very accurate focus is easily set. At f/2.8, the lens is already perfectly sharp with some contrast improvement at f/4. The lack of vignetting and distortion, the flatness of field and generally very attractive smooth defocusing without CA issues make the lens better than typical fast standard designs.

On the LA-EA4 with autofocus, a limited set of AF functions ends up activated and there’s always the issue of the slight delay and sound caused by mechanical aperture operation. AF-C is of limited use, along with this video functions. However, I don’t generally use this type of lens for action or for video.

I made plenty of non-image tests by defocusing bright edges, both ways, and could find no hint of colour problems. I then set up a small food shot using the close focus – exactly the reason I find a lack of close focus restricting – and made tests at f/2.8, f/5.6, f/11 and f/22 to look at the bokeh. My conclusion is that I will be hard pressed to find anything technically better, or with a more pleasant character to the background defocus, in the c.50mm focal length. The series covers all four apertures.

I am aware that one comment will be that f/2.8 simply isn’t wide enough. There’s no significant differential focus and you’d need 50mm f/1.0 to get what many photographers want. However, this is all to do with viewing size. We all tend to see pictures on smartphone screens, on Facebook, or even on our own camera three-inch screens. In fact, at f/2.8 there isn’t enough depth of field for a typical real-world use of a full page reproduction and f/5.6 is just about right. For a poster, f/11 would be good. At f/22 the whole image is slightly softened as expected and it’s just there to complete the set.

For the moment – at least until a Batis version of the 50mm f/2 Makro Planar appears and answers all my demands perfectly – I think this Minolta-derived 50mm macro will do fine as my ‘standard’ lens.

David Kilpatrick, aka ‘some random blogger’ (©SAR comments March 2016)

Added August 30th 2016: Sony has announced an E-mount 50mm f/2.8 Macro focusing to 1:1 with a stated RRP of $500 – really, they must have read this article in March. In the meantime, during the Brexit fiasco I caved in and bought a 55mm f/1.8 CZ, suspecting the price would be 20% higher soon enough (and sure, it was). My new example is no better than those I originally tested but it has its uses and in a flat plane – no defocused image to screw the results up with an ugly mess – it’s the sharpest 50-55mm I have used. I’m still using the 50mm macro and recently spend a month using the Samyang 50mm f/1.4, which is not as sharp as the CZ but handles blur and bokeh more elegantly. Both lenses don’t really excel at suppressing Longitudinal CA, one of the strengths of the A-mount macro. Hopefully the new SEL FE 50mm macro will also give clean, colour-shift free foreground and background bokeh.

Added July 29th 2017: I have now bought the 50mm f/2.8 Sony FE Macro, and put my A-mount macro lenses up for sale. The E-mount focuses to 1:1 rather closer than I would like, at 16cm which indicates its internal focusing changes the focal length to something more like 37mm to 1:1 (16cm is a pure 40mm at 1:1 assuming no optical thickness to the lens). It’s an extremely sharp lens with bokeh as good as the A-mount 50mm and no trace of CA.

DK's ramblings, Lenses - Alpha Mount, Uncategorized

My new Sony 85mm…

Posted on February 22, 2016 By David Kilpatrick

With extremely expensive Sony-fit 85mm lenses in abundance and beyond my (economically sensible) reach, I’ve done good commercial work last year on the Canon 85mm f/1.8 USM and later the Sony 85mm f/2.8 SAM on A7RII. Some of my work relies on showing close-up details with strong differential focus, and hardly any lenses are free from ‘colour bokeh’ issues, so it’s needed some care to process the files and avoid that typical magenta tinge to the background and greenish hue to foreground blur.

This is a typical example. It’s on the Canon 85mm f/1.8, and although this is a fairly clean lens, the background at f/4 needed some post-process work to avoid a magenta colour shift.

In contrast, absolutely no work is ever needed on my Sigma 70mm f/2.8 macro. It shows no chromatic effects in defocused areas. But this is a studio shot at f/10 – and, like many commercial shots, the extreme f/1.4 or f/2 apertures which are so highly valued by the bloggerati simply don’t enter the equation. Differential focus here is precisely balanced against the legibility of the bottle wording at web size (these shots are for a 1440 pixel wide template).

I like to have a choice of wider aperture and macro lenses for this kind of work as they all produce different effects. My 70-210mm f/4 Minolta AF classic, for example, has about the cleanest foreground blur wide open on 0.25X scale 210mm close ups. My 85mm SAM is ‘dirty’ by comparison (but its 60cm 0.20X minimum focus distance still makes it the best 85mm for close work unless you use a macro or a zoom with good close range). Then, we get the Zeiss Batis 85mm f/1.8 popping up followed now by the costly Sony G-Master 85mm f/1.4 FE. In both cases you get 80cm minimum focus and around 0.12X image scale (rather like the 70-200mm f/4 Sony G FE lens used at 190mm and 1m focus).

I really like, on a full-frame camera, to reach one quarter life size on the sensor. One-eighth, the 0.12-0.125X type of scale, means a full A4 magazine page fills the frame. One-quarter, 0.25X, means a quarter of that page or a postcard size fills the frame. There are so many things in the world, from a kitten’s face to a lily in bloom or a perfect cup cake, which are about this size. When I photograph food I often want to avoid including the edges of the plate completely. Those lenses which push me back too far prevent that. I know many users will be puzzled by my preference and see no reason to want to get any closer. Well, that’s just me. I have always done well creatively and commercially from surprisingly tightly cropped, close-up work.

And, being more critical of these new hyper-expensive lenses, we’ve had 80cm focus 85mm lenses for SLR focusing for 70 years now. Really, any new lens in this focal length should focus to 60cm or ideally 50cm without calling itself a macro. That suits the way we live, in our cars, at desks, at home, at tables, in small spaces, giving other people space. I really like to be able to place an item in front of me, or even hold it in my hand, and focus on it. I can’t do that at all with 1m minimum focus (the old rangefinder Leica standard!) and only just with 60cm.

Then I started seeing some work taken on an interesting old lens. It’s small, taking 49mm filters. It is fast, at f/2. It was originally designed by Carl Zeiss and if you were really lucky you might find an 85mm f/2 Sonnar. But for around £100/$150 or a little more for guaranteed condition you can buy the Russian Jupiter 9 85mm f/2 manual preset lens in M42 screw (Pentax/Praktica). And since it’s a screw mount SLR lens, you can add an extra layer of focus extension for very low cost between the E-mount body and the lens.

Above: my Jupiter-9 with Camdiox helical Pentax screw E-mount adaptor fully extended and with a vital lens hood fitted; top, the mount and lens set for infinity focus, lens hood removed.

So last week I assembled a relatively low-cost eBay rig to enable even closer focus than the 60cm of the SAM . This is partly just experimental, our of curiosity to see how well a 1930s Sonnar type design made in 1980s Russia with 1950s technology and coatings can peform. The 85mm f/2 Jupiter-9 is often used to get an attractive f/2 soft-focus with core sharpness, gradually cleaning up until around f/3.5 the softness is gone. It is also used to get neat circular bubbles from strongly out of focus light sources beyond the subject, or a generally very attractive focus transition at any aperture since the 19-blade mechanical iris forms an almost perfect circle at all settings. It focuses slightly closer than 80cm.

With the well-made Camdiox helical adaptor costing under £28 delivered, this is extended in a continuous range to 35cm from the film plane and 0.51X. Obvously, it takes up no more space than my plain M42 adaptor as it is exactly the same thickness at infinity setting – and it does allow true infinity focus. Being solid metal, the combination is not all that light, a dense 490g in its 88mm long by 63mm maximum diameter, 20g more than the Batis. But it feels good. The aperture mechanism is crude and difficult to see and use, but would normally be set first to a chosen aperture such as f/2.8 for the best sharpness with a shallow depth of field, or f/8 for landscapes. It would not be much fun for anyone who likes taking a range of shots from f/2 to f/16, or for anyone wanting accurate half or third stops.

First of all, is this lens even remotely sharp, and can the Sony A7? bodies use it well? Both answers must be yes. Just set the focal length for normal distances to 85mm and the in-body SSS of the A7SII, A7II and A7RII will give amazingly effective stabilisation. Work between f/4 and f/11 and this simple old lens design outresolves the A7R. I was just checking the focus on some calendar text in very dim room light, using ISO 1600 on my A7RII, when I pressed the shutter with 1/40th hand-held –

This was never intended to be seen, just a casual target. These pictures open out to Facebook size, by the way, when clicked – 2048 pixels. Here’s a 100% pixel friendly section from this. I was surprised. The lens was at f/4 and focus was done at max magnification, at the taking aperture.

You need to check this JPEG out by clicking to open/view at 100%. It’s like this right across the frame, corner to corner. There’s a pleasant dimensional quality to the rendering this old lens gives, but it has one massive failing – it flares up dramatically if any light at all reaches the front glass. The only solution is a very deep lens hood indeed.

Making more considered tests, I headed for a target I had set up to explore colour bokeh, that unpleasant magenta to green shift in defocused areas. With this set-up, my 85mm SAM is not bad at all and does benefit from a proper lens profile. As you can see, the music doesn’t seem to change much in colour from front to back though in the full size 42 megapixel file, especially without lens CA corrections, some funky colours do appear.

Here’s how the Jupiter-9 worked out – first of all, it’s one of a number of shots at different distances and angles, not identical to the SAM shots, and this one takes advantage of the closer focus combination of adaptor and lens:

The colour shifts are different, with a bit of a rainbow including red and cyan fringes as well as magenta and green, and the contrast is lower. However, the detail in the very limited f/2.8 focus zone is very fine and over a range of tests the blurring (from the circular aperture) just looks better. No doubt I need to take many more shots with this lens (once the deep 200mm lens hood I’ve found arrives…) but it seems like a worthwhile creative option alongside a number of older manual lenses.

What really interests me is that this same design, with a few refinements of modern manufacture, would surely be worth having. Tamron’s forthcoming 85mm f/1.8 will focus close – it is the special feature of this new lens series – and maybe along with the 35mm and 45mm f/1.8 designs will one day appear in native E-mount. I’d love to see a half-price Batis, a Sonnar f/2 variant instead of f/1.8, with a decent close focus limit around 50cm. Until then I’ll use the SAM on LA-EA3 or LA-EA4 (works well with either) and my assortment of manual set-ups including this Jupiter-9.

Here’s a revision to the post, got some sunshine this morning (day after writing the original post) and with focus peaking and f/5.6 even a little moving target comes out whisker-sharp!

– David Kilpatrick

DK's ramblings, Equipment Reviews, Lenses - E mount, NEX System

Sony’s Master plan – new 85, 24-70, 70-200 and more

Posted on February 4, 2016 By David Kilpatrick

On Tuesday, February 2nd 2016, Sony UK held a press event to which I was invited. Well, I’m in a different country and about 400 miles from their Weybridge offices, so as usual my trusted English office editor at large (and son) Richard made the still substantial journey from Leicester. The result was a completely wasted day, his time and our company’s money, looking at a mixed bag of TVs, camcorders, headphones and all the Alpha and RX gear we already had seen long before.

Then on February 3rd, mid-afternoon, the same PR agency which had extended this generous invitation to come and gather ZERO editorial content for our magazines announced the new G-Master series 24-70mm f/2.8 FE, 70-200mm f/2.8 FE and 85mm f/1.4 FE, 1.4X and2X extenders, and upgraded A6000 successor A6300.

I was attending an excellent event with Graphistudio on the road in Edinburgh (they do try to cover the whole of our surprisingly large and still united kingdom) and returned to see the news. Talk about mixed emotions! I was furious that they should cost me a very real £300 or so (that’s what it costs, whether I do it, or Richard, or a hired freelance) to cover yet another of their red herring events just 24 hours before a major announcement like this. We get nothing free from Sony, they don’t advertise in our magazines, and unlike Minolta they don’t offer pre-launch access to pre-production samples.

And that’s why I should not even be writing this. In the past, I would never – as a responsible journalist and technical editor – have made any comment on equipment I had not been allowed to handle and preferably use if only for an hour or two. But these days a thousand bloggers try to drive traffic to their sites by doing exactly that.

Here are my thoughts, anyway.

Click to open full size official images!

The A6300

It’s 24 megapixels like the A6000 and does claim a slightly faster and wider zone AF. But the A6000 is already close to perfect and I normally shoot with centre point focus, not any of the wide zone modes. I really don’t want the collar on a dog sharp and its face out of focus just because the collar is the more contrasty target which the wide area focus finds first. It’s also twice as much as I paid for my A6000, which happens to have been selling for a market-beating price. I have a great set of lenses – 10-18mm, 16-50mm, 35mm f/1.8, 50mm f/1.8 and 55-210mm. All except the 10-18mm cost about half the official retail because Sony did some great deals. Basically anyone like me who has invested in a decent A6000 (or NEX-6, even) kit and already own an A7S, SII, or RII can take the A6300 or leave it. In fact my now-outdated RX10 and RX100 MkIII do pretty neat silent shooting, one of the main upgrades over the A6000.

If you need the very fast (120fps) refresh of the new EVF, 4K video and the improved audio functions (whether using jack plug mic or the MFAccessory shoe mic choices) then it’s easy – it will cost you less to get these than any other comparable route. Even the RX10 MkII no longer looks so attractive. As others have commented, it’s partly a matter of waiting for the body price to fall by the end of the year. In the meantime my A7RII actually does all the movie stuff I need (its APS-C 4K is superior to its full frame, and makes full use of line-up of lenses above).

However, if they manage to lend me a test sample and the new sensor turns out to kill the already wonderful noise/ISO ratio of the 6000 I could be won over early at a high price. Had this been a 36 megapixel body I would be thinking very differently, and perhaps even considering a switch from full frame to APS-C.

The 24-70mm f/2.8 and 70-200mm f/2.8 G-Master FE

With a 77mm thread and an overall size not far removed from the A-mount equivalents, the weatherproofing and generally improved design of the AF system will win buyers. The longer lens has the 0.96m close focus I’ve been campaigning for now for several years, and it’s disarmingly simple. If you study lenses, you’ll have realised that SSM, stepper or linear motor type AF (silent, no gears) has caused the increased and restrictive focus distances I’ve covered in Cameracraft and elsewhere. It has just been unable to provide enough movement. As an example, compare the old screw-drive 28-75mm Konica Minolta with the ‘identical’ Sony 28-75mm SAM. The 24-70mm f/2.8 A-mount models are actually amongst the better in this respect, managing the magic quarter life-size to important for many subjects. The 24-70mm f/4 FE is not as good though you would have though it easier to make close focusing with a simpler, slower lens – only 0.20X. At least the 24-70mm f/2.8 FE matches up to its A-mount equivalent.

In these new fast FE zooms Sony has improved performance by using more accurate asphericals, designated as XA (extra aspherical, presumably meaning a curve which was out of reach before). Combined with expensive glass types (low and extra-low dispersion) and complex design (23 elements in 18 groups for the 70-200mm) this enables apochromatic correction although they do not use the term. This removes ugly colour bokeh effects. A ‘floating’ internal focus action for the rear unit gives a wider fully corrected focus range, affecting both the focused distance and the flatness of field. An SSM (ring) motor drives the heavy, larger forward group focusing and a linear (rail) movement shifts the rear assembly but the whole focus action is internal.

I welcome the 96cm close focus (I trust it applies across the whole zoom range and with AF all the way). This lens achieves 0.25X scale at 96cm. Compare that to the Tamron Di VC USD 70-200mm which can only manage 0.125X, half the subject size, at 1.3m and that’s by switching to manual focus – it forces you back to 1.4m from the subject if you use AF.

It’s also worth comparing size; most new 70-200mm DSLR lenses are around 185mm long, the Sony is 200mm long. But it’s really ‘smaller’ than the original Sony A-mount 70-200mm’s 197mm. That 15mm extra length is almost entirely dead space, a kind of extension to the barrel in order to handle the 18mm register of the E-mount, and also enable the use of the 1.4X and 2X extenders. This extension falls behind a fixed, not removable, rotating tripod mount collar which has a removable foot instead.

I’m sure that the dual focusing will be fast, with two simultaneous actions combined, and ideal for contrast detection as well as on-sensor PDAF. My reservations are simple enough though – these are lenses for one-system users, dedicated to mirrorless. There really is no saving over the latest A-mount versions in weight and size, and many photographers (like me) may want to use both A and E mount bodies. I’ve been considering investing in another A99 even though I sold mine. That’s because it is so much more comfortable and complete with my longer lenses than the A7RII with LA-EA4 or 3, both of which I have. If I did so the 24-70mm and 70-200mm A mount would be on the shopping list, and what reason would I have for buying even more expensive new FE versions which could never, ever be used on a A-mount body?

The 85mm f/1.4 G-Master FE

One guide to acceptable minimum focus distance is the simplest formula imaginable. A lens should be able to focus – at the least – to the same centimetre distance as its millimetre focal length. So, a 50mm lens should manage 50cm, a 100mm lens 1m, a 200mm lens 2m or closer. But that’s the least you need. The ideal is HALF the mm in cm. A 50mm focusing to 25cm is brilliant, a 200mm focusing to 1m is amazing (Vivitar once made one, with a bright f/3 maximum aperture too).

So, for me the 85mm f/1.4 with its substantial 82mm filter thread, 850g weight and focusing down to 80cm (some data tables say 85cm) with 0.12X image scale is just acceptable. A Samyang 85mm won’t go so close and most 85mms don’t break the 1m barrier. But an ideal new, modern 85mm would focus to 50cm. It’s just pretty hard to enable this using SSM or linear AF drive. Even the Carl Zeiss Batis 85mm f/1.8 is the familiar 80cm, 0.126X scale.

What I actually use right now is an 85mm f/2.8 SAM lens on LA-EA3. It’s not 100% free from CA and colour bokeh issues, but it is exceptionally sharp and it focuses right down to 60cm with 0.20X scale. Above all it is very small and light, and for me that is most of the point of the A7RII and all the A7 series bodies. It focuses perfectly on my LA-EA3. I can use it with A-mount extension tubes or my Meike metal full frame FE extension tubes, but that’s a bit of a crude solution.

Results from the MG 85mm so far seen, disregarding some fairly cheesy portraits, show that its 11-blade iris and apochromatic XA correction do deliver more than you will ever get from an 85mm f/1.2 Canon or a Samyang or a Sony 85mm f/1.4 ZA. The manual 1/3rd stop clicked or click-free aperture ring combined with the absence of magenta-green bokeh shift mean this lens will be massive for vids, whether creative porno or music promo. It should be on the same level as Zeiss/Arri ciné lenses if the claims stand up, and I would not be surprised to see a dedicated cinema version.

It’s a long way from the 85mm SLR lenses of Minolta’s past – six iris blades!

The extenders

Sorry, but most FE and E lenses can never (ever) use a a tele extender. That’s why you have not seen any. It’s also why I use that 85mm SAM… it makes a neat 170mm f/5.6 wth my Teleplus 2X MC-7. Way back, one of my favourite travel outfits including the Minolta XD-7 with 85mm f/2 and a 2X converter, 170mm f/4 was a sweet spot in every respect.

These two converters can only be used with the new 70-200mm f/2.8 G-Master FE. When you look at how far the converter unit extends into the lens barrel, you’ll see that this is a combination designed from the start. The rear element of the FE lens is deeply recessed, midway between a typical E-mount design (18mm register) and an A-mount (rear element no closer than 42mm to the sensor).

The extenders add less length than an A-mount variant would, and the back focus of the FE lens is shorter. But it’s a mid-way compromise. Extenders are easy to make for DSLR back focus register, they are difficult or impossible to design for 18mm register mirrorless like Sony or Fuji unless the host lens is matched exactly to the extender. And the 70-200mm f/4, for example, is not…

The compromise

And, having mentioned compromise, I should explain the great compromise which has made the entire Sony E/FE system much larger than it needs to be.

It’s all down to the A7R 36 megapixel sensor. This sensor, more so than the 24 megapixel full frame, requires a very telecentric lens design. That is, more like a DSLR lens, despite the slim A7 series body. In order to perform acceptably with this sensor, the FE lens range could not be designed to be as small as a rangefinder system equivalent, or to take full advantage of the 18mm mount to sensor distance. Brian Smith, whose images are great (not cheesy portraits) but whose technical info clearly comes via Sony PR, says this: “Mirrorless camera design has allowed Sony’s lens designers to place larger than normal lens element close to the body”. Actually, they don’t, as the design of the extenders will tell you. They’ve used a stronger degree of telephoto construction in the long zoom, allowing a smaller than normal rear element and they have taken measures to move it further away from the body – and this is a general trend. If you want to see what a properly small 85mm f/1.4 looks like try a Carl Zeiss Planar 85mm f/1.4 ZE in Canon mount – 72mm filters not 82mm, 570g versus 850g and really solid all-metal manual focus. The mirrorless bodies do provide a zone from around 16mm to 42mm from the sensor surface which can accommodate the rear of the lens, and can’t ever be used on a DSLR. But Sony does not make full use of that and can not do so because of the microlens, filter layer and structural characteristics of the A7R sensor.

All Sony FE lenses and all CZ independent FE lenses have been designed to work well with the A7R. The 28-70mm kit lens was not, but most owners find it acceptable. They could have made some of the lenses a fair amount smaller and lighter if the A7R had never existed. The A7RII is so tolerant towards short back focus, oblique ray angle imaging, that a whole different range of lenses could be designed for it… but never will be.

The system has to remain compatible with its earlier components, especially the first ‘flagship’ body A7R. And that is going to constrain design and increase costs for ever into the future. In contrast, see the Fujfilm X system. We have yet to find whether the new 24 megapixel Fujifilm sensor disagrees with any older lenses, but all new lenses no matter how fast, small or clever have full compatibility with all the earlier bodies and don’t seem to have any compromises in design.

Here’s my view, after doing a lot of digging around over the last two days (Sony PR does not supply any of the technical data for the released lenses – all that had to be found, and cross-checked, from Sony corporate and various dealer sites). I have found some interesting historic lenses like the 50mm f/1.5 and 85mm f/1.5 Zeiss Biotar. They are simple and perform poorly by today’s standards but they are very small. I am familiar with many excellent lenses I’ve used in the past like the Minolta MC/D 45mm f/2, the MD 85mm f/2 and of course the ‘beercan’ 70-210mm f/4 AF. I loved my first serious freelancing kit, Pentax Spotmatics with 20mm f/4.5, 35mm f/3.5, 50mm f/1.4 and 105mm f/2.8. I’ve used some good lenses which have been perfect with all A7 series bodies, such as the Voigtlander 21mm f/1.8, the Canon 40mm f/2.8 STM, and several rangefinder 35mm f/2 or f/1.4 lenses. All of these have been small and perfectly in keeping with the A7 series mirrorless bodies. I think Sony’s inspiration for new lenses should have come from classic rangefinder and compact pre-digital SLR glass, rather than from the bloated f/2.8 zooms of professional digital SLRs.

In 1999, with a multi-state road trip in the USA to enjoy, I left the SLR kit at home because I was using two Minolta CLE bodies, a 20mm Russar, 28/40/90mm Minolta set and a Leitz Elmar 135mm f/4.5. SLRs in the AF era had started to became big, plastic and clumsy with fairly poor zoom lenses. I opted for the NEX/A/A7 system because I thought we were heading back to light, elegant, unobtrusive little jewels of lenses. Ah well, not so. We’re going to be sold lenses built like a Kardashian ass and learn to live with it!

– David Kilpatrick

A zoom specification comparison

Sony Carl Zeiss 24-70mm f/2.8 ZA SSM II – focuses to 34cm, 0.25X, 77mm filters, 975g
Sony Carl Zeiss 24-70mm f/2.8 ZA SSM – 34cm, 0.25X, 77mm filters, 955g
Sony Carl Zeiss 24-70mm f/4 ZA FE SSM OSS – 40cm, 0.20X, 67mm filters, 430g
Sony GM 24-70mm f/2.8 FE SSM OSS – 38cm, 0.24X, 82mm filters, 885g
Sony G 70-200mm f/2.8 SSM II – focuses to 1.2m, 0.21X, 77mm filters, 188mm long, 1300g
Sony G 70-200mm f/2.8 SSM – 1.2m, 0.21X, 77mm filters, 197mm long, 1500g
Sony G 70-200mm f/4 FE SSM OSS – 1-1.3m*, 0.13X, 72mm filters, 175mm long, 840g
Sony GM 70-200mm f/2.8 FE SSM OSS – 0.96m, 0.25X, 77mm filters, 1480g, 200mm long, 11-blade aperture

*Focus to 1.3m at 200mm, 1m when set to 190mm or shorter focal length. 0.13X at 1m and 190mm.

All the pictures used here have, linked to them, the full sized unwatermarked official Sony PR images except the first image which we have cropped a load of useless white space from – Sony likes useless white space, as the others show. Web and magazine editors hate it and constantly have to crop product shots…

Lenses - E mount, News, NEX System, Sony Digital Cameras

Low-cost macro for the A7 series

Posted on October 20, 2015 By David Kilpatrick

It’s been a while since my last review of Sony products here, and not because I have been inactive. The truth is that I’ve spent so much on Sony kit 24/7 working has been necessary, including a good few reviews and tests of the A7RII and lenses appearing elsewhere. It’s a real issue, I now lose so much value with the lightning-fast depreciation of Sony’s products within a few months of launch that my old tactic of buying, reviewing and selling no longer works. For one thing, no media in the world will readily pay a fee which even matches the amount you might lose on a camera body in the A7 series over its first two months of retail life. Sony have been good enough to lend me a few items for brief periods but you really can’t form any useful opinions on such radical and new hardware on that basis.

However, my A7R II report is shortly on the way, and the extra time spent using the camera and suffering the damage to my credit card does not harm the process. It helps put the gear in context. I’ve resisted the anti-social pricing policies of the UK camera retail environment for some time, even buying one grey import from Panamoz. So it’s appropriate that my first article for a fair while should be intended to help you save money and get great results from any A7 full frame FE mount camera, while also supporting a company whose UK pricing policies are entirely reasonable – Sigma.

The Sigma 60mm f/2.8 ART DN lens

The butterfly above is one example of what this lens can do on uncropped full frame, in this case adding a single 16mm extension tube, which we’ll come to later as the exact type of tube you buy matters a great deal!

The neat, low-cost 60mm f/2.8 is the portrait lens in Sigma’s Art DN lens trio for APS-C and MicroFourThirds mirrorless systems. I’ve used the 19mm f/2.8 and 30mm f/2.8 as well, but the 60mm is my favourite. Originally, I tested it on Olympus MFT and the 50cm close focus with their 2X factor made it almost feel like a macro. It’s actually just 1:7.2X scale, but 1:3.6X relative to full frame on that smaller sensor. That’s a really good working distance and subject scale.

I was curious to see how much of the full frame the 60mm would cover. All these Sigma lenses are just £129.99-£139.99 retail at most UK dealers right now. They are beautifully designed and made, very light, use 46mm filters and have advanced optical design giving high contrast and first-class full aperture sharpness. Well, the answer is easy enough; you’ll get more than APS-C, with a 24 x 24mm square format crop working well, but not anything like full frame at any aperture from the 60mm.

This is the closest focus of the Sigma ART DN 60mm on the A7R II, uncropped.

Sigma call it a telephoto, with its rear nodal point much closer than 60mm to the focal plane. But its design signalled it would probably perform well as a macro lens too.

Meike extension tubes

So, we add extension tubes between the A7-series body and the lens. There’s one prominent make, Meike, and a couple of years ago I bought their very low-cost fully electronically coupled plastic 10 and 16mm twin tube set. 26mm of extension is not much. It won’t even make the E-mount 35mm f/1.8 focus to 1:1, and does even less with a 60mm. However, what it does is worthwhile combined with the lens’s own focusing range.

I found my plastic Meike tubes have a narrow circular throat and cut the image off all round. But, you say, the image was cut off all round already, so what could be done?

When you mount an APS-C lens on tubes, it covers more than APS-C. Put it on tubes adding about 1.4X to its focal length – like using 26mm of tubes on a 60mm lens – and it will cover full frame. You are moving the lens further from the focused plane, and as you do so, its fixed angle field of sharp coverage grows (it more or less follows the inverse square law, as does the effective working aperture of the lens when you use tubes). So a lens made for the NEX sensors, c.16 x 24mm, can cover 24 x 36mm when used on tubes for close-ups. The 60mm on 26mm of tubes would cover 24 x 36mm even with no leeway. Since the lens already has a good image circle, it turns out that it covers 24 x 36mm when used on the 16mm tube alone, and shows just a hint of corner cutoff with the 10mm tube alone. With both, it covers the full frame easily.

This is the result of using a 10mm metal extension tube – not the plastic set. The plastic design cuts off even more than the lens used on its own.

Meike understand this. They have a newer, metal-mount extension tube set costing about twice as much as the original plastic one. To get it, you must search for Meike metal extension tubes – and they are not easy to identify for certain. There’s very little explanation on-line. These tubes have a full width throat with baffles top and bottom, more or less matching the 24 x 36mm frame shape. Some black flock paper is glued in to prevent light reflection at the sides, but none is fitted top and bottom, and this is the main weakness of the design (you can obtain flock paper and fix this yourself).

Twin set, no pearls

Used alone, the metal Meike tubes turn the Sigma 60mm into a very good close-range long standard lens for the A7 series. I found that you can add the plastic tubes next to the lens, not next to the camera, and suffer no cut-off. This combination of four tubes adds 52mm and makes the Sigma 60mm able to do 1:1 with the addition of its own AF range.

You need to understand sensor-based stabilisation before using any manual lens on tubes (which these are equally suitable for, with adaptors). The A7 II series bodies use the focal length and focus distance of the lens as transmitted to the camera to control the Steady Shot Inside function. As far as I can tell from practical tests, the Meike tubes do not transmit any change to the information reaching the CPU, but SS seems to be OK with such relatively minimal extra focus extension.

This shot was taken at 1/15th hand-held with the 16mm tube on the A7R II, ISO 800, 14-bit uncompressed raw, f/8 on the Sigma 60mm lens. There’s no significant corner vignetting with 16mm of extra extension to the lens.

This is a 100% clip from the shot.

When I mount my 50mm Macro SMC Takumar on the A7R II I use either the SSI menu control, or the Lens Compensation App, to tell the SSI system I’m using a lens with an extension in place. It focuses to 1:2 size, and for this I tell the camera I’m using a 75mm lens not a 50mm. If I add 26mm of tubes, it will focus to 1:1 and I need to tell the camera I’m using a 100mm lens. That’s because a 50mm lens extended to 1:1 focus has the same camera shake characteristics as a 100mm lens used on a distant scene. Be careful, as this relationship only holds good for simple lenses (Tessar, Sonnar etc) and not for any zoom lenses, or any macro lens which uses internal focusing. If you mount a Tamron 60mm f/2 macro on your Sony body using a dumb adaptor, just tell the camera it’s got a 60mm attached. The Tamron changes focal length to focus, but the effect for anti-shake purposes is that it remains a 60mm. Its angle of view remains unchanged as you focus, while my 60mm Sigma when used at 1:1 repro covers half the angle of view it does at infinity.

I am not entirely sure whether the Meike tubes work properly with SS Inside, or if the system simply has enough latitude to function with my degree of unsteady hand-holding. Those contacts just seem to make a connection, with no chip to add information. The EXIF data does show the focal length correctly, and the set aperture (which will be a reduced effective aperture at closer range, 26mm of tubes turns 60mm f/2.8 into a working f/4-ish). But the focus distance is shown as whatever the lens focus function chip confirms – a range of 50cm to infinity. That’s obviously incorrect when tubes are added, in contrast to using a dedicated lens like the Sony 90mm f/2.8 FE G OSS Macro, which will show the true focused distance in the viewfinder and also pass correct data to the CPU.

So, a warning – the 60mm plus tubes is not technically perfect but seems to work well enough.

When you use a tripod or flash, or a fast shutter speed, and turn off Steady Shot none of this applies. In practice with shutter speeds fast enough to stop subject action or wind vibration, it all goes well. The Sigma is very sharp even though not designed for macro range work, but that’s typical of this type of lens – even if 8 elements in 6 groups with several low-dispersion elements is not basic.

Here’s an example with 26mm of tubes plus some lens focus range. The ISO 800 14-bit uncompressed file has allowed some work on the bee’s back which lacked contrast. Click to open a 2048 pixel wide version.

Here’s an example which clicks through to a full size A7R II AdobeRGB JPEG (no doubt much crunched by WordPress image storage) taken at f/9 on the 16mm tube. If any of my image files have 20mm in the filename it was the 16mm tube – I’m so used to the lengths used by regular SLR mounts! The 60mm has a seven-blade aperture and gives pleasantly neutral defocused quality behind the subject. You can call it bokeh if you want to. Thank you, Scottish weather, for keeping a few flowers in this condition and giving me some sunshine just after the 14-bit uncompressed raw upgrade for the A7R II arrived.

The Metal Meike extension tubes have the same essential benefit over the plastic version with all FE and E mount, and legacy, lenses used of the A7 series full frame bodies. You can use them on the 28-70mm, 24-70mm, 55mm f/1.8, 28mm f/2 and most lenses though they have little use with the 70-200mm and I would not recommend hanging a 24-240mm off a tube.

Footnote July 2017: I now have the 50mm f/2.8 FE Sony macro. It’s a very nice lens, indeed, but the internal focusing means it’s really more like a 40 to 35mm as you get the subject bigger, and you end up just millimetres away. I compared using this lens on 26mm of tubes to focus on a target 7.5cm wide with the lens itself set to infinity (and therefore, 50mm). Working distance from the lens rim to subject – 11cm. Then I took the tubes out, and focused the lens using its own range, on the same target. The clear distance was reduced to 7.5cm. Now you know why you need tubes and probably don’t really need a macro lens.

– David Kilpatrick

If you have found this article useful, you can support Photoclubalpha by using affiliate buying links (we are not sponsored or paid in any other way, except by selling subscriptions to f2 Cameracraft).

Sigma 60mm at B&H

Vello metal mount extension tubes at B&H (similar to Meike)

Sigma 60mm F2.8 DN for Sony E – Silver from Amazon UK, no idea why they have none in black

Neewer metal extension tubes – much better price than Vello! on Amazon

Visit Wex Photographic and search for any items (UK)

Accessories - 3rd party, Equipment Reviews, Lenses - E mount, NEX System, Photo Techniques, Sony Digital Cameras

Amazon UK price drop on 16-35m f/4 FE

Posted on July 20, 2015 By David Kilpatrick

Of interest to UK full frame owners – Amazon EU (and also at least one other vendor) has the 16-35mm f/4 FE on sale with a 37% discount at £799.99, on top of which Sony has a £100 cashback on this lens – and I can confirm that these cashbacks work 100% reliably. This makes the lens £699.99 including VAT which in my case is recoverable, which may also apply to others outside the EU or in specific zones.

Update 12 noon July 21st: all were sold within 12 hours of the this story going live. Sorry, they are now at least £190 more from authorised sources eligible for the cashback, still a substantial reduction but not this exceptional deal.

Sony Vario T* FE 16 – 35 mm F4 ZA OSS Lens

I’ve been using a loaner review sample of this lens for three weeks and conclude from tests that (performance being equal) it will be up to the A7R II – and Sony would not sell me the lens directly even with a press/trade discount for any less than this. Even secondhand ones fetch £695.

It may seem odd when I’ve got various other ways to cover this range, but it’s simply a lens I have grown to like a lot in use. The 72mm filter thread and its overall size and weight seem just right. Some other lenses may be sold to cover the cost and all, in their own ways, are better in some aspect – my 20mm VSL II is very versatile on a tilt-shift adaptor, my Samyang 24mm TS is equally so, and I’ve been making good use of a trio of Canon fit lenses adapted including the Sigma 12-24mm. It’s always difficult to decide which to use, how big a kit to assemble for a job, and the 16-35mm kind of solves this for me. OK, no 12mm, no TS but 42 megapixels will give me the ability to crop a 16mm shot instead of shooting a shifted 20mm or 24mm.

– David

Lenses - E mount

No FE or A mount for new Sigma 24-35mm f/2

Posted on June 18, 2015 By David Kilpatrick

We’ve had news of the new Sigma Art HSM high speed wide angle full frame zoom – 24-35mm f/2.

It will be available in Nikon, Canon and Sigma mounts only (release date not yet confirmed) according to Sigma in the UK.

Note that this will be a bit of monster with its 82mm filter thread, 117mm long barrel and substantial petal lens hood.

Sigma does not make a full frame DSLR. Sony is now a major market for high end full frame lenses. What’s going on here? We’ll just have to wait and see. Maybe Sigma just reckon every FF Sony mirrorless owner will have a Canon AF adaptor and maybe their HSM – which works pretty well on the A7II – will even allow fast AF on the new A7R II.

– David

Accessories - 3rd party, Lenses - Alpha Mount, Lenses - E mount, News

Samyang 12mm f/2 NCS CS lens

Posted on January 12, 2015 By David Kilpatrick

Sometimes you find a chunk of glass which just works. One of the problems with lenses is that you can never have too many. They overlap, they duplicate each other, and yet they can be so different that you need every single one. The new Samyang 12mm f/2 for mirrorless APS-C systems is one of these. It’s the budget alternative the Carl Zeiss Touit Distagon 12mm f/2.8 T*, and so far everyone I’ve found who has used both lenses – including me – rates it as better optically. This isn’t what you expect from a lens with twice the maximum aperture at half the price.

I have good reasons for not owning a Touit 12mm. I already have a Sony 10-18mm f/4 OSS E, and rather like the Fujinon XR OIS 10-24mm f/4 this lens offers nearly perfect performance as a working ultra-wide zoom and adds the benefit of stabilisation for video or tripod-free interior shots.

The Sony appears to have very fine detail sharpness wide open, little sign of fall off in illumination or sharpness, and good geometry.

Click this image for a full size, f/2 available light shot taken in a covered archaelogical dig

However, the Samyang when used on the same Sony NEX-6 16 megapixel camera forced a reappraisal. It offers sharpness on a different level and manages to do so even at f/2, with corners far more detailed and clean than any lens with a 99° angle of view should manage.

It is equivalent to an 18mm on full frame, and this is around my favourite angle for an architectural, street and general lens. Where the 24mm angle is a common feature of consumer zooms and easy enough to use, lenses in the 17-21mm equivalent range produce a distinctive result but need careful composition and an understanding of perspective and lens geometric projection. Lenses like this separate the experienced user from the unskilled masses.

Stopping down to f/16 secures great depth of field (the Canarian cacti are not huge, bush sized and very close not tree size!) with just a hint of sharpness loss. Click image for a full 16 megapixel file

Weighing only 245g, it’s not a big lens though it has a generous 67mm filter thread round a much smaller front element which does not protrude. The bayonet lens hood is removable and reversible for storage, with a soft pouch supplied to hold everything. You can use circular filters without cut-off provided they are reasonably slim-line, and filter systems from 75mm rectangular upwards. Our sample was in a matt silver finish, with conventional black as an alternative. The focusing down to 20cm is very smooth, with a travel of 135°, and the aperture is click stopped gently but positively in half steps all the way to f/22. The mount is metal, as is the barrel skin, though plastic components are used internally. It is an advanced design with 14 elements in 10 groups using both low dispersion and compound aspheric glass, nano-coated with Samyang’s water and dirt resistant hard NCS multiple layers.

Above: Auto White Balance and auto exposure with the Sony 10-18mm at 12mm, on NEX-6

Above: AWB and AE with the Samyang 12mm set to f/11 like the Sony (darker, and much colder colour)

Above: Samyang raw shot after colour correction to taste

Though this lens had to be manually focused and lacks any electronic connections, it rapidly proved to be a reliable companion. Auto exposure tended to be slightly under, and auto white balance was nearly always too cold. On the NEX-6 manual exposure and a fixed daylight or custom set white balance proved better than relying on auto setting.

The results are the reward. For its aperture and angle, it defies the laws of trade-off. The geometry, even without creating a profile or applying the slight barrel correction sometimes needed, is so good that uncorrected raw conversions worked perfectly. The example above is a full frame, with no correction at all (you can click the image to open the full size file, though remember it has strong compression for storage and display here).

Here is the same view taken with the Sony 10-18mm, at 12mm, and at f/11, exactly the same compression

For some subjects, a two-pixel blue chromatic aberration correction removed a barely visible tendency to purple fringes, more likely to affect high contrast patterns than high contrast edges. The lens has such high resolution that moiré patterns appear from many subjects.

Compared to the Sony 16mm f/2.8 fitted with a 12mm ultra-wide converter – the original Sony solution from 2010 – it’s like moving from small to medium format.

Here’s an example which shows the geometry of the lens pretty well (click for full size)

And here’s the same historic suspensioon bridge, again at f/11 to get the necessary depth of field. But the sharpness is not destroyed and a 100% clip shows the spiders have been busy (compression almost loses the strands of the webs which are easily seen in the original file):

It does not have enough circle of coverage in reserve to make it valuable on full frame, but a near-24mm square can be cropped on the A7 series.

This lens would be a dream to use if it incorporated a chip to convey EXIF data including the aperture. AF really doesn’t matter, after a few days I learned to preset the focus manually and only check the most critical wide-open subjects using magnified manual focus view. At under £300, it’s so tempting just to have it for the sheer sharpness right into the extreme corners and the straight-line rendering. Much though I like my £700 10-18mm it has had less use since the Samyang arrived – and that says it all. My main reason for sticking with the 10-18mm is its ability to work well on the A7R for 15mm shots, and its full recording of EXIF data along with full control from the body. Much though I like my boxful of manual lenses, after a year and more using them, I am missing the vital data – as going back a year to look at original files shows. Unless I made a special note at the time, I often have no idea what lens was used let alone what aperture. For these shots, of course, I noted the details.

This article original appeared in a slightly shorter form in f2 Freelance Photographer, our six times a year super-quality professional and enthusiast magazine, Nov/Dec 2014 issue published in early October 2014. In 2017, f2 was merged with Cameracraft and we now use the Cameracraft name. You can subscribe to this magazine, which supports my work here, at www.iconpublications.com

You can find the Rokinon (Samyang rebranded) at B&H for worldwide sales – //www.bhphotovideo.com or at Amazon (UK) – //amzn.to/2oySu1b

or in the UK, the Samyang at WEX Photographic (these links benefit Photoclubalpha if you buy there, without costing you anything)

– David Kilpatrick

Accessories - 3rd party, Lenses - E mount, NEX System

Sony’s BIG system future at photokina

Posted on September 17, 2014 By David Kilpatrick

I’m using my RX10 to report. This camera is my big Sony dilemma. It’s actually all I really need for 95% of my daily work.

Well, here we are reporting from photokina 2014, the major trade fair in Cologne. I’m only here for the day and a brief stop in tomorrow morning en route to the airport, and my first appointment was with Sony. To be frank, it doesn’t matter that much as everything has already been publicised on many web pages. My only request, to be allowed to take some test frames on my A7R using any of the new FE lenses, was turned down because the lenses were ‘pre-production’. I was not pleased to be standing within earshot when, ten minutes later, the very same 16-35mm f/4 was being made available to another UK journalist not only to use but to take outside the hall into the Messehallen surroundings for ten minutes (chaperoned).

Of course you need a Canon sign over queues. It is after all the brand of herd!

I don’t need an outside scene to assess a 16-35mm – give me a room with vertical pillars (plenty) and some small very intense bare bright light sources (ditto) and I can pretty much do an optical test on such a lens in a couple of dozen frames. The good news is that Sony UK may be better placed to let photoclubalpha (and all the other media I write for) have loan lenses. In the last year, I’ve bought £10k worth and sold £5k worth of Sony and related third party gear to be able to keep up to speed with the rate of new products and their sheer cost.

If equipment had cost this much relative to earnings when I set out in photography, I would never have become a photographer – it would not have been possible. It would have been making a choice – a deposit on a house, a secondhand car, or a camera and three lenses?

And lenses are certainly being rolled out. The new roadmap concentrates entirely on the E-mount systems (FE and E, full frame and APS-C). The Alpha 99 may still be there as a flagship for the A-mount but there’s really nothing here, no news, for A-mount system users.

Hands-on reports from photokina often mean nothing more… hands-on! No pictures allowed with the glass. It looks like a lens, it works like a lens, but it’s really only half a lens.

Unless, of course, it is two times a lens. The ciné targeted 28-135mm f/4 power zoom for FE may have the ghost of a Minolta 28-135mm hiding inside its suit of armour. It’s huge.

In a sealed but rather grubby fingermarked cabinet sat the new lenses – a Carl Zeiss Distagon T* FE 35mm f/1.4 ZA, a Sony FE 24-240mm f/3.5-6.3 OSS, and a Sony FE 90mm f/2.8 Macro G OSS. I wiped the drool marks off the glass with my secret weapon (a packet of tissues) and took some individual pictures.

OK, the glass didn’t clean up all that well and there were many reflections to avoid.

But here is what you need to see – a 90mm macro with an external OSS on-off switch so you do not have to menu dive to perform this function when tripod mounting, as well as a triple range focus limiter. But this len is a real monster. We have to assume it uses internal focusing with a design like this.

And here is another surprise. Like Fujinon XF lenses, the forthcoming CZ 35mm f/1.4 has an RX-style third f-stop clicked aperture ring, with an A setting at the extreme beyond f/16. My guess is that there is also an RX-style click disengager round the back, making this a superior lens for ciné but almost certainly needing a firmware update for camera bodies as it is the first A or E mount (electronic aperture) lens to feature an on-lens aperture control.

Then we have a neat 28mm f/2 AF for FE, joining the Carl Zeiss Loxia manual focus, electronic function 35mm and 50mm lenses shown elsewhere on the stand (one day I may feature these if we find them exciting enough).

This lens has two optional adaptors – very much like the adaptors for the 16mm E series pancake, a 0.75X wide angle (converts it to a 21mm f/2) and a fisheye (converts it to a 16mm f/2).

I would say many of the size advantages of the A7 full frame camera series are completely negated by all of these new lenses and by the adaptors. What we actually need and want is a handful of properly compact sensor-matched lenses, smaller perhaps than the existing 35mm f/2.8 FE, and not a range of lenses which increases the overall size of a mirrorless kit to the point that you might as well have a DSLR. It’s not quite that bad, they are still a bit smaller overall, but here’s the 28mm converted to fisheye:

I’ll leave you with the test set-up for the A6000 and lenses –

I’m off for a meeting with Sigma. Just got ten minutes to find them!

– David KIlpatrick

Cameras (DSLR), DK's ramblings, Events, Lenses - Alpha Mount, News, NEX System, Sony Digital Cameras

B&H double Zeiss Touit lens deal for NEX

Posted on June 1, 2014 By David Kilpatrick

I guess that Zeiss must be working right now on full frame Touit lenses, because this is unprecedented value for those able to buy in dollars without steep shipping charges, duties or taxes – however, the links they emailed out today led to a wrong page on their USED section, and after a lot of digging to get the right URL, the offer is needless to say on back order – and B&H are taking a Jewish holiday from June 3rd to 5th so you’d better jump in quickly before close of biz on June 2nd.

BOTH the Carl Zeoss Touit 12mm f/2.8 and 32mm f/1.8 lenses for the E-mount for only $919 from B&H with free US expedited shipping (they do not cover full frame and I’ve tested them and found a fairly tight image circle). They are stunningly good for NEX-7, NEX-6, A6000, A3000, A5000.

http://www.bhphotovideo.com/c/buy/0/Ntt/Zeiss+Touit+Lens

Here are the actual image circles of the three Touit lenses (12mm, 32mm and 50mm f/2.8 macro which is not in this deal) on A7R, without applying any distortion or vignetting correction. All the lenses have an Adobe profile and in the case of the 12mm this enlarges the image circle substantially. Normally, this means the lens is a true 12mm equivalent with the profile applied and the actual focal lenth could be closer to 10.5mm.

First, the Touit 12mm without lens profile

Now, the Touit same shot but converted from raw applying the built-in lens profile (conclusion – the profile applies to an APS-C frame and does little good to the outer field on full frame – you are better off using the lens without the profile, including on APS-C, if you want maximum wide-angle coverage)

Then the 32mm f/1.8 on the A7R (like the shot above, at full aperture – image circles generally do not get larger when you stop down, if the edge is as well-defined as these Zeiss lenses)

Finally, the 50mm f/2.8 macro to complete the reference. All pictures taken from behind the counter of the Carl Zeiss stand at The Photography Show – hence the great lighting and subject-matter…

– DK

Accessories - 3rd party, Lenses - Alpha Mount, NEX System, Offers

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