Samyang 12mm f/2 NCS CS lens

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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.

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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.

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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.

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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.

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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.

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

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

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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.

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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).

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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.

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

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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):

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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

Photokina new matte box, 55-300mm

Made by Sony according to girl on photokina stand after asking bloke. But closer examination matte box/rig says Genius as the maker so pretty sure it’s third party. Similar shown on other cameras.

55-300mm SAM DT.

We were allowed to take test shots briefly with the Alpha 99 and 28-75mm SAM lens. The camera is just a little bigger than the A77 but feels much the same. The viewfinder seems slightly improved, maybe it’s just the optics used and not the OLED display – coatings or details of the assembly.

This is an ISO6400 in-camera JPEG, click it for full size. Shots with face out of focus look awful, the noise/NR on skin tones is not as good as on the dress made of flowers. Colour is excellent under tungsten with AWB, as usual.

Here’s an ISO 25600 image, same in-camera output. Not bad at all considering the ISO. In both cases, you can click on the image to get a full size version (5-6MB).

This is a 100% crop (click for full size) slightly overexposed, at iSO 400. The A99 showed a green face recognition square in this case, and focused at full f/2.8 aperture of the 28-75mm lens – sharp image core, but lots of softness glowing round it. Exposure was too generous for the dress, so I’ve cropped that out and just taken an 1800 pixel wide detail to show the quality at 400.

We were able to handle the RX1, it’s wonderfully smoothly engineered and feels great, but no pictures were allowed. They have no pre-production models able to produce an image they are happy to share. We saw a thumbrest which slots into the hot shoe (below the optical finder only, improves ergonomics; and an EVF for the RX1 –

Apart from that there was a great launch from Panasonic for a GH3 capable of 78Mbps video, waterproof, dustproof, magnesium body, new X-series lenses f/2.8 constant 24-70mm and 70-200mm equivalents; a funky new XF camera from Fuji which might appear a bit retro-consumer but actually is good to hold and use; and Samsung’s quite amazing Galaxy Camera, which has the biggest rear screen (and one of the best) ever seen plus a 21X zoom but won’t make phone calls. Yet…

-D&SK

 

Mapping the planes

Samsung has a patent and a plan for using two lenses with triangulation (image offset) depth detection between two images in what is roughly a stereo pair. Here’s a link:

http://www.photographybay.com/2011/07/19/samsung-working-on-dslr-like-bokeh-for-compact-cameras/

Pentax also have a system on the new Q range which takes more than one exposure, changes the focus point between them, and uses this to evaluate the focus map and create bokeh-like effects. Or so the pre-launch claims for this system indicate, though the process is not described. It’s almost certain to be a rapid multishot method, and it could equally well involve blending a sharp image with a defocused one.

In theory, the sweep panorama function of Sony and some other cameras can be used to do exactly the same thing – instead of creating a 3D 16:9 shot it could create a depth mapped focus effect in a single shot. 3D is possible with sweep pans by simply taking two frames from the multi-shot pan separated by a certain amount, so the lens positions for the frames are separated enough to be stereographic. 3D ‘moving’ pans (scrolling on the TV screen) can be compared to delaying the playback of the left eye view and shifting the position of subject detail to match the right. But like 16:9 pans, they are just two JPEGs.

All these methods including the Samsung concept can do something else which is not yet common – they can alter any other parameter, not just focus blur. They could for example change the colour balance or saturation so that the focused subject stands out against a monochrome scene, or so the background to a shot is made darker or lighter than the focused plane, or warmer in tone or cooler – etc. Blur is just a filter, in digital image terms. Think of all the filters available from watercolour or scraperboard effects to noise reduction, sharpening, blurring, tone mapping, masking – digital camera makers have already shown that the processors in their tiny cameras can handle such things pretty well.

Once a depth map exists there’s almost no limit to the manipulation possible. Samsung only scratches the surface by proposing this is used for the esoteric and popular bokeh enhancement (a peculiarly Japanese obsession which ended up going viral and infecting the entire world of images). I can easily image a distance-mapped filter turning your background scene into a Monet or a van Gogh, while applying a portrait skin smoothing process to your subjects.

Any camera with two lenses in stereo configuration should also, in theory, be able to focus using a completely different method to existing off-sensor AF – using the two lenses exactly like a rangefinder with two windows. So far this has not been implemented.

Way back – 40 years ago – I devised a rangefinder optical design under which you can see nothing at all at the focus point unless the lens was correctly focused. It works well enough for a single spot, the image detail being the usual double coincident effect when widely out of focus, but blacking out when nearly in focus and suddenly becoming visible only when focus is perfect. I had the idea of making a chequerboard pattern covering an entire image, so that the viewfinder would reveal the focused subject and blank out the rest of the scene, but a little work with a pencil and paper quickly shows why it wouldn’t work like that. The subject plane would have integrity, other planes would not all black out, they’d create an interestingly chaotic mess with phase-related black holes.

Samsung’s concept, in contrast, could isolate the subject entirely – almost as effectively as green screen techniques. It would be able to map the outline of a foreground subject like a newsreader by distance, instead of relying on the colour matte effect of green or blue screen technology. This would free film makers and TV studios from the restraints of chroma-keyed matting (not that you really want the newsreader wearing a green tie).

The sensitivity of the masking could be controlled by detecting the degree of matched image detail offset and its direction (the basic principle of stereographic 3D) – or perhaps more easily by detecting exactly coincident detail, in the focused plane. Photoshop’s snap-to for layers works by detecting a match and so do the stitching functions used for sweep and multi shot in-camera panorama assembly. Snap-to alignment of image data is a very mature function.

Just when you think digital photography has rung all the bells and blown all the whistles, the tones of an approaching caliope can be heard rolling down the river…

– David Kilpatrick

 

Nikon D3X announced at last!

RRP: £5499.99 / €7728.00
Availability: Late December 2008

Nikon UK is pleased to introduce its new top-of-the-range premium D-SLR – the D3X. Building on the reliability, handling and durability of the award-winning D3, the D3X offers an imaging sensor with over twice the resolution* of the revolutionary D3, breaking new ground in image quality.

(*Nikon’s own words – actually, it’s twice the pixel count, and approximately 1.42 times the linear resolution, as resolution is normally understood, though the visual information density is more than doubled).

The all-new 24.5MP CMOS* sensor makes the new model eminently suitable for the broadest range of shooting situations, both in the studio and on location – ideal for photographers seeking unrivalled detail.

(*Nikon’s own words again – we must wait to find out whether it is really all-new, or is a derivative of the Sony 24.x megapixel sensor. See features below of gapless microlens array and 12-channel readout, which are not claimed by Sony. Samsung pioneered gapless microlenses in the 14.6 megapixel sensor for the Pentax K20D/Samsung GX20).

“This is the camera that many professional photographers have been waiting for,” said Robert Cristina, Professional Products and NPS Manager at Nikon Europe. “Just as the D3 has become the professionals’ camera of choice in sports photography, the D3X’s extremely high imaging resolution will raise the bar for commercial, fashion and stock photography. The results speak for themselves: this is without doubt our highest-quality camera to date.”

The World is Your Studio

The D3X boasts a specially-developed FX-format CMOS image sensor with 12-channel readout, gapless micro lens array and on-chip noise reduction. It delivers class-leading levels of continuous shooting speed and noise management at higher sensitivities without sacrificing detail.

The D3X supports a broad ISO range from ISO 100-1600, extendable down to ISO 50 and up to 6400 equivalent with up to 5 fps continuous shooting at full resolution, or 7 fps in the 10MP DX-crop mode. The acclaimed MultiCAM3500FX 51-point autofocus system enables extreme accuracy with outstanding dynamic tracking for fast moving subjects in low light.

The camera’s LiveView function offers a smooth workflow option, perfect for studio work or other situations where the use of the viewfinder is impractical. The camera also delivers a superb response rate, with a start-up of just 12 milliseconds and 40ms shutter lag. The Kevlar/carbon fibre composite shutter has been designed for intensive professional needs and tested to 300,000 cycles.

Images with the X factor

The D3X reaps the benefits of the very latest developments in sensor design and image processing technology. Designed to produce files suitable to meet the demands of tomorrow’s commercial and stock requirements, the camera produces 50MB 14-bit NEF (Raw) files. Using Capture NX2 software, NEF files can be processed into medium format terrain; 140MB (16-bit TIFF-RGB). Fine details are reproduced with incredible clarity, whilst shadows and highlights contain tonal gradation with minimal clipping for pictures with a unique look and feel.

Intuitive control

The D3X shares the same ergonomics and handling as the D3, which have been designed to enable anyone to get to work quickly and efficiently. The bright, uncluttered viewfinder features 100% coverage and comprehensive illuminated displays, while the high-definition, 3-inch, 920,000-dot VGA TFT monitor enables outstanding playback quality for on-the-spot image assessment. The D3X’s magnesium body, which is sealed for moisture and dust resistance, also supports Nikon’s wireless system (the WT-4), HDMI output, offers a dual slot for CF cards and is compatible with the new GP-1 GPS unit.

See: http://www.europe-nikon.com/product/en_GB/products/broad/1726/overview.html