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+--- Thread: Canon EF adapter with AF (/showthread.php?tid=2172)
Canon EF adapter with AF - youpii - 10-17-2012
From the video, the AF looks a bit erratic but it works.
http://www.sonyalpharumors.com/a-message-from-mxcamera/
The more interesting information is the upcoming Contax G adapter for Zeiss lenses.
Canon EF adapter with AF - popo - 10-18-2012
Although I haven't tried it, I think the NEX has the best MF assist of existing mirrorless cameras so combining it with Canon lens control makes that a lot more attractive than the M if I were to revisit mirrorless any time soon.
Canon EF adapter with AF - Klaus - 10-19-2012
[quote name='youpii' timestamp='1350511867' post='20651']
From the video, the AF looks a bit erratic but it works.
[url="http://www.sonyalpharumors.com/a-message-from-mxcamera/"]http://www.sonyalpha...-from-mxcamera/[/url]
The more interesting information is the upcoming Contax G adapter for Zeiss lenses.
[/quote]
The G adapter should be difficult. G lenses have an AF screw so this is more complex than the support for a system with in-lens AF motor.
Canon EF adapter with AF - Umb67 - 02-01-2013
Hello, I've just received the [url="http://www.metabones.com/buy-speed-booster"]Speed Booster adapter from Metabones[/url]. Autofocus works fairly well, not as fast as on an a real EOS camera, but usable and better than the adapter shown on that video.
But the real bonus, is that you get the same full-frame coverage on the Nex APS-C sensor! The optical element in the adapter acts as a 0.71x focal reducer. so a lens made for the FF sensor will be able to project its entire FOV on the APS-C sensor.
And, with this process (the same amount of gathered light is spread on a smaller area) you gain ONE f STOP! An f/4.0 lens will act as a f/2,8 and an f1,4 will work like an f/1.0.
There's no decrease in quality in can see, the optical part has been designed by Caldwell Photografic, very well regarded for their Coastal Optics 60mm f/4 UV-VIS-IR APO macro, a 4495$ beast used in forensics.
I've posted a very quick first impression images on my Blog:
http://nex7canon.blogspot.it/2013/01/metabones-speed-booster-first-test_28.html
No decrease in quality I can see (in fact, images with the adapter looks a bit sharper), but now I can use a very nice 17-40L at 2,8 on my Nex-7! I'll order the EF 50 f1,4 USM soon, can't wait to use a real 50mm at f/1.0
Image stabilization works too, EXIF data works so my f/4.0 reads as an f/2,8 both in the camera and in the EXIF data and even the MF/AF switch on the lens is properly recognized, so if I select MF, the Nex switches into Manual focus mode with peaking+magnification, then it goes back to AF mode when the lens is switched back to AF.
Canon EF adapter with AF - Klaus - 02-02-2013
It's always nice to see center crops. However, the key with something like the 17-40 is the border/corner performance.
Canon EF adapter with AF - Umb67 - 02-03-2013
[quote name='Klaus' timestamp='1359806938' post='21710']It's always nice to see center crops. However, the key with something like the 17-40 is the border/corner performance.[/quote]
True, but I wanted to wait a bit and take time to test different Canon lens, the 17-40L, while it's fairly good in the center, doesn't perform very well on edges even on a real FF Eos, it shows strong vignetting, but it would be enough for me the adapter wouldn't make it worse, and using it at f/2.8 equivalent it's a real bonus.