The Angry Photographer: REVIEW: Sony Cyber-Shot DSC-RX100MIII . What!? Point and shoot? Yes
Voigtländer 40mm f/2.8 Heliar samples and impressions (Dpreview).
Creativity, Style & Gear: The latest 500px Q&A with Sony Artisan, Brian Matiash (Sony Blog).
Sony FE 28mm samples and review at Sonymirrorlesspro.
Sony Image Sensor Demand Said to Exceed Supply (Image Sensor World).
Sony FE 24-240mm lens test at Itmedia.
A7s Reader Photo Shades of blue (Los Angeles Time).
Anonymous: “This wasnt reported at the time but there was an interview at dc home a few months ago which i think would be an interesting discussion. In the interview the interviewer asked about the A77II AF module in the LA-EA6. The Sony engineer says the size of the module is a problem for an adapter. It would be an interesting discussion around would the readers accept a larger bump in the LA-EA4 to get better AF?
Link:http://dc.watch.impress.co.jp/docs/news/interview_dcm/20150220_688742.html
Translated:
–The mount adapter equipped with translucent mirror technology isn’t made denial, but I think I’m incapable to use 15 point AF sensor of LA-EA4 by full-sized α as expected. I think thing asking I don’t have is understood sufficiently, but there should be LA-EA6 α 77 II treated to 79 AF sensors (temporary)…,….Hosokawa: The size of the AF module also becomes big to achieve a wide AF area.
It’s a problem whether it’s put in the size which can permit that as a mount adapter and after all whether the usual type phase contrast AF system by translucent mirror technology is a good one or, is a system using image face phase contrast AF good? The place where I’d like to reduce what kind of merit there is to a customer and think as technological directionality.
Japanese Text:
――トランスルーセントミラー・テクノロジーを搭載したマウントアダプターを否定はしませんが、やはりLA-EA4の15点AFセンサーは、フルサイズのαで使うには力不足だと思います。ないものねだりは十分承知していますが、α77 IIの79点AFセンサーを奢ったLA-EA6（仮）があればいいな、と思うのですが……。細川：広いAFエリアを実現するには、AFモジュールのサイズも大きくなります。
それをマウントアダプターとして許容できる大きさに収められるかどうかが問題ですし、そもそもトランスルーセントミラー・テクノロジーによる従来型位相差AF方式が良いのか、それとも像面位相差AFなどを使う方式が良いのか? 技術の方向性としてお客さまにどういうメリットがあるのかを整理して考えていきたいところです。“
14 Responses
If you read the Japanese interview from DC.Watch carefully, you can get the idea what Sony is planning to do in the future.
And it also answer many questions frequently asked by Sony user.
..
For example, it explain why no telephoto lens in E-mount
Go on…
The editor ask, why no e-mount 70-300G or 70-400G?
The Sony Guy said,
“面位相差AFの方が測距できる幅が狭くなるのが課題です”
On Sensor PDAF has a limit range in distance measure.
“コントラストAFの空間被写体検出AFといった、像面位相差AFの弱点を補う技術もありますので、” We can use space recognize CDAF to compensate this weakness.
“超望遠ズームでどのくらいのAFパフォーマンスが得られるか、という検討は行っています” However, what AF performance we can get from the tele zoom lens, are still under study.
That’s really helpful! Sounds like the la-ea4 is probably the way to go for anyone waiting for something longer… What I don’t understand is why they haven’t made a weather sealed version.
think its so they can sell you more adapters in future tbh. are there long lenses in other mirorless mounts? nikon has a 70 300mm dont they?
also couldnt they use on sensor pdaf and dedicated pdaf on a mount? didnt the a99 have that?
I think there must be some technical difficulty.
The Nikon 1 system use 1″ sensor, smaller sensor -> wider DOF.
The OSPDAF in A99 also cannot work independently, it must use with dedicated PDAF.
May be Sony will think of a way to solve the problem in the future.
Olympus has a 75-300, Nikon has a 70-300. The 24-240 throws a spanner on the works though – af is usable at 240mm and is only really limited by the slow aperture.
Meanwhile, Sony should give us a damn trio of FF A-mount bodies that can get the most from A-mount lenses Not play around with E-mount and leave us A-mount users with a camera than can’t compete against the D750 (or even the D610)
That’s very interesting to me. I’m quite fond of the 70-300mm lens class and had been wondering why it wasn’t already produced.
I wonder if the 24-240 has poor AF performance at the long end as well, or, if that’s the maximum right there…
I suppose my hopes of seeing a 100-400 class lens for A7 is very unlikely. I may have to consider a second camera for those uses. I have the Tamron 150-600 with LA-EA4 and it’s “Okay” in terms of AF performance, but, the narrow AF point coverage of the LA-EA4 is frustrating, especially with wildlife moving around the frame. I don’t care about shallow DOF. In fact, wildlife shooting is made quite difficult by the extremely shallow DOF of 600mm lenses even at f/8. This may finally be a reason to consider Nikon 1 or MFT for this particular use case.
Nikon 1 has the 70-300 which is effectively 168-720mm and AF is very fast, but, then one has to consider the relative weakness of high ISO performance since it’s an f/5.6 lens. On MFT, Olympus is giving a 300 f/2.8 (600mm equiv) that’s supposed to be impressive, and the E-M1 has OSPDAF… but, even with only CDAF those cameras outperform larger sensor CDAF cameras in AF, for whatever reasons (readout speed, is my guess, besides the larger DOF.) I very much prefer a larger format camera. 35mm seems like the point where photos coming through really look like what I want, but, there are some applications where Sony has no game at all in the compact interchangeable lens arena, and wildlife is one of those areas. Since this is an area I only enjoy occasionally, maybe I’ll just live with the Tamron + LA-EA4 solution, but, it is certainly not the most ideal combination of equipment.
Anyway, thanks for the additional info.
広いAFエリアを実現するには、AFモジュールのサイズも大きくなります。
(The size of the AF module will be bigger to get wider AF coverage.)
それをマウントアダプターとして許容できる大きさに収められるかどうかが問題ですし、
(The larger AF module may not able to fit into the adapter)
そもそもトランスルーセントミラー・テクノロジーによる従来型位相差AF方式が良いのか、
(It is better to use translucent mirror technology with dedicated PDAF module)
それとも像面位相差AFなどを使う方式が良いのか?
(or use On Sensor PDAF ?)
技術の方向性としてお客さまにどういうメリットがあるのかを整理して考えていきたいところです。“
(We are still considering what benefit of each technology can bring to our customers)
stop talking crap and eat that bloody strawberries !!
This guy does some great videos. I started watching them a few weeks ago. He’s also adament about prefering DSLR’s (Nikon). For him to praise this camera says something.
i……
LA-EA6 with A77MK2 PDAF module inside can be tripod mount ring alike which to my thinking is pretty functional, and you don’t have to care that much about size.