Alpha A9 promises professional performance

You can order the A9 here – any of these links to order will help photoclubalpha pay our way.

B&H have it listed 

WEX in the UK (also Calumet)

Amazon (

The front view below of the Sony Alpha A9 body, introduced today, gives a subtle clue about changes under the hood. For some time we’ve been nagging Sony about the weak, potentially tilting, 4-screw mount on the mirrorless bodies. Now they have at least added two more screws, to match Fujifilm X or the A-mount, even if the distribution is a bit odd with all the extra strength concentrated at the sides not the top and bottom where heavy lenses normally cause most stress.

It’s a clue to a different internal construction, probably stronger all round, to make it possible to support the new 100-400mm G Master  lens, a native E-mount new design which should come as a relief to those struggling with the A-mount 70-400mm varieties on adaptors:

But the lenses still have four-screw mount fitting (as do most A-mount lenses), and fairly weak sacrificial assemblies to prevent damage to the camera if knocked. See this video (it’s a bit long but makes a point): //

The EVF of the A9 is around twice as bright as the A7RII and also runs at twice the refresh rate, while offering 50% more pixels. Part of this is down to the new stacked-CMOS 24.2 megapixel full frame sensor, which has a readout some twenty times faster than the A7II and previous generation 24 megapixel models. That, of course, is linked to the 6K native live feed from the full frame (used to create very high quality 4K video as well as an excellent live view) which in turn enables a distortion-free purely electronic silent shutter running to 1/32,000s plus 20 frames per second sequence shooting.

AF is claimed to be 25% faster than the A7RII and when the shutter speed is faster than 1/125s there is no visible blackout in the finder when shooting. Personally, a single frame (1/120s or 1/60s) blip would never be unwelcome as it helps tell you when you’ve shot. As for the low-light capability, not too much is being said; it’s in the usual up to 56,200 range with extension of two more stops. (Edit: April 20, we have noticed that at least one ‘reviewer’ – Sony Artisan paid to promote – completely wrongly claims 2,048,000 ISO not the actual 204,800, when comparing the A9 with the Nikon D5’s listed 3,276,800). The high speed sequences, movie frame rate and EVF refresh all tend to limit ultimate low-light clean imaging and we would guess that the A7SII and A7RII will not be made redundant.

That can not be said for the old weeny weedy weaky batteries of the E-mount range. The stripling NP-FW50 used in all the NEX to A7 series models gets kicked aside by a slightly larger variant with 2.2X the capacity. Frankly, it’s overdue but it creates a split system. I’m happy to travel with my A6000, RX10, and A7RII all sharing a pool of batteries even if those do run down alarmingly fast.

If it means carrying a new dual charger too, to get the necessary 2.5 hour recharge time instead of a leisurely overnight in-camera top up, I can only hope the charger (cum mains adaptor with clumsy dummy battery connection) also accepts the older batteries. It’s carrying multiple chargers that increases my travel bag weight not carrying extra batteries.

But… I see that the charger ‘cradle’ can mount four of the new cells, and charge the lot in 480 minutes. This cradle has a dummy battery on a lead, and 1/4″ tripod thread mounting points to add it to a video rig (which this camera is not specially made for, indicating an A9S is on the way with S-Log and direct 4K top quality encoding). The dummy battery then powers the camera for roughly 10X the life of the current A7 series batteries. So what if you have an A7 model? Easy – the outer shell of the battery simply slides off, revealing a SMALLER dummy inside, which fits the entire NEX/A7 mirrorless range or indeed the RX10 series. So your existing Sony mirrorless kit can be powered using this ‘battery bank’.

The top plate reveals that some input has been listen to. As a regular M1-M2-M3 user on my A99, the drop to only two memory registers on the A7RII is unwelcome but survivable. A return to three, plus a a custom button memory recall function, will make the a9 better. Having the drive modes on a physical control is good too. But I’ll leave any verdict on all this until the actual operation is better known – whether, for example, the memory registers now cover more than just the primary camera settings and thus enable one-step tripod setup.

I’ll have to say that after using the Olympus OM-D E-M1 MkII, which offers many of the advantages being claimed by the A9 as major selling points, the non-reversible simple tilt rear screen remains a negative compared to a fully articulated reversible screen. Sony does now offer a real glass protector, but I like the A55 to A99 style screen which can be turned to face the wall permanently if you want (and has never arrived on the E-mount models).

The new joystick controller takes something from the A99/II controls and adds it to the wheel of the A7 series, while the upper thumb button becomes a native back-button AF. In addition to being able to move the focus points faster (it’s a pain with the A7RII design) there is a memory for AF point selection and a horizontal-vertical switch function. Combined with a larger number of AF points covering 93% of the sensor, the action/sports performance of the A9 should be a long way ahead of any earlier mirrorless (though the A6500 is pretty good).

Though not visible here, there are two SDXC (one UHS-II) card slots with the usual recording options similar to the A99/II, and also an Ethernet port which is almost a requirement for some major sports events. You will notice that the Drive control has a Focus control below it, giving direct access to the kind of AF/MF/DMF choices found on the dedicated controller of A-mount bodies – no more need for menu or Function/Custom button operations.

The eyepiece, shown here, may perhaps be a little less prone to detachment and we are promised the least squiffy finder view with new optics.

There is one minor fly in the ointment, a price-tag of £4,500 (UK) body only; the 100-400mm will be £2,500. While the team of assembled ambassadors made much of praising the silent shutter mode and small size of the camera at Sony’s vidcast press conference, none of this is new and pretty much anything the A9 can do is also within the reach of the A7RII and A7SII even if it does it faster and perhaps better. There was some praise for the durability of the system – what? I don’t know about others, but I find the Sony/Zeiss lenses are the worst I’ve ever owned for showing almost immediate signs of wear from the lightest contact with clothing and bags. Silver appears through the molecule-thin black coating instantly and neither the regular lenses nor the bodies have ever struck me as being suitable to knock around in a busy press kit or travel bag. Where old Leicas survived years of abuse elegantly, gradually brassing at the edges, my Sony kit generally just looks a bit scruffy and used despite minimal handling. The A9 looks about the same in this respect as the mark II lesser models.

Full official press information and specifications can be seen here:


And for the lens:


  • David Kilpatrick



Sony’s precision aspherics

In interviews about the new micron-accurate aspheric lens element moulding process used to increase the resolution of the latest Sony G Master lenses, a visual has appeared which shows the ‘onion ring’ effect that coarser mould machining causes in lens elements.

Working independently, I’ve been aware of this for years – and I have used a point-source photography technique to study lenses. I’m not an optical engineer or scientist, indeed I don’t even have a degree in anything. I came into photography through Victorian books and teenage years experimenting with lenses, developer formulae, building my own equipment and using observation, corollary and deduction to understand how things work. It’s helped me explain difficult technical stuff to many thousands of readers through books and magazines, without using maths or formulae, and very few diagrams.

In the Cameracraft back in 2013 I published a home-brewed rendering of aspheric moulding visual analysis.

Here’s Sony’s visual showing the difference between traditional aspheric moulding (pressed glass aspheric, as pioneered by Leica and Sigma) and their new refined pressing with better engineering.


And here is my home-brewed visual from Cameracraft when I explained the bokeh and resolution issues created by pressed elements (and also, some other aspects of bokeh, which I’ll refer to below the image):


This is the clip from a 2013 article in Cameracraft dealing with broader aspects of bokeh, depth of field, aberrations and how images are rendered. You can download the two-page article here. Nine years after we launched Cameracraft the magazine is going strong, it’s a bit thicker and does have the occasional advert unlike our original, but it is still one of the best ‘never knew that before’ reads a photographer can have drop through the letterbox. You can arrange that easily enough here!

Here is the full article as a downloadable PDF.

Sony’s new superlens was not any better than the Sigma 70mm f/2.8 macro which I still use. My reasons for choosing this macro are simple – it is optically excellent and traditionally made without any aspheric or other special elements, and it uses simple focal extension for focusing, not rear or internal group movement. This means it’s a true 70mm lens even when used at 1:1 and gives the maximum lens to subject distance, for its focal length.

However, it’s MUCH better than the Voigtländer 50mm f/1.4 used for the colour bokeh shift example at the top. Sony’s information makes it clear that the new more precise aspheric moulding allows new surface profiles and the elimination of chromatic aberrations which cause this magenta-green foreground to background shift in so many otherwise excellent lenses. I’ve said that to do so, the new lenses must be what would once have been called Apochromatic, though that term has only ever meant that all wavelengths focused to the same plane and at the same scale. Even past Apo lenses can show poor colour bokeh. It’s interesting that Sigma, after years of plugging the APO (capitals not actually needed, folks!) label chose not to label some new lenses this way even through their performance matched or exceeded earlier APO models. Sony seems to be taking the same view – G Master will be sufficient label to imply very high resolution, elimination of bad colour bokeh shifts, and by implication an apochromatic performance on RGB sensors.

So will I be buying these amazingly expensive, large, E-mount dedicated lenses? Probably not. My unscientific observations tell me there are smaller, lighter, far less expensive lenses which will serve me better. Mirrorless digital camera bodies with high quality EVF and high magnification focusing allow me to  do things I could never have done over 40 years ago when I took my first position as a Technical Editor (of the UK monthly Photography published by Fountain Press and edited by John Sanders). Geoffrey Crawley, editor of the British Journal of Photography, showed me how to evaluate any lens quickly with the help of a light bulb, a darkened studio, a roll of background paper and a sharp pencil. Back then you had to expose film, now you can just look through the finder. In a photo store, any LED spotlight will do for a quick check. Focus centre, magnified to max, at full aperture. Move to all corners in turn without refocusing, magnify each time. Refocus each corner in turn when magnified, examine change in rendering of point source. Buy the lens which shows symmetrical, balanced results and the best sharpness of the corners when the centre is correctly focused. Do this with a light source at least 3m/10ft away and if you can, even further. Repeat one stop down, two stops down, with zooms repeat at three or four focal lengths across the range. Never do it at close distance (hint: lens test chart results are only good for the distance you photograph the chart from, which is why Imatest, DxO and other labs have test targets the size of a wall and industrial sized space to work in).

And, if you have a single LED bulb or miniature LED torch, you can examine any of your lenses in a darkened room and produce a ‘bump map’ which will reveal its moulding defects, scratches or fungus, blemishes, and population of dust and microfauna.

– David Kilpatrick


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And if you really want a trip back in time – there were huge changes between 2012 and 2015. Cameracraft documents the rise of mirrorless, the growth of hipster retro, and the discovery of older manual lenses as it happened. You can read a full set of the 12 issues via this one-off YUDU subscription:

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Read Cameracraft 2012-15
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