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therealthings
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Re: A7RII and Canon lenses AF compatibility


Ok so i tried playing with the best lens combination so far (the sigma 35 Art) and i experienced the AF bug like i talked about earlier several times. Here is what happens.

If i have the camera powered down, and mount the Sigma 35 1.4 Art lens, then power on the camera, AF works fine.

After some time (when camera hibernates, not sure if that happens, but the LCD goes black, when i half press the shutter to wake up the camera and use AF, it does not AF anymore. In the menu it says i need to enable AF on the lens (Focus Mode is greyed out).
Then i need to re-mount the lens in order to be able to AF again. This looks like a bug in the MB firmware.

I have not experienced this with canon glass yet. This might be a Sigma EF mount problem. I\'m hoping others with Sigma Art lenses can test this as well.

Opened up a seperate thread for this:
https://www.fredmiranda.com/forum/topic/1380654



Aug 11, 2015 at 12:05 PM
therealthings
Offline
Upload & Sell: Off
Re: A7RII and Canon lenses AF compatibility


Ok so i tried playing with the best lens combination so far (the sigma 35 Art) and i experienced the AF bug like i talked about earlier several times. Here is what happens.

If i have the camera powered down, and mount the Sigma 35 1.4 Art lens, then power on the camera, AF works fine.

After some time (when camera hibernates, not sure if that happens, but the LCD goes black, when i half press the shutter to wake up the camera and use AF, it does not AF anymore. In the menu it says i need to enable AF on the lens (Focus Mode is greyed out).
Then i need to re-mount the lens in order to be able to AF again. This looks like a bug in the MB firmware.

I have not experienced this with canon glass yet. This might be a Sigma EF mount problem. I\'m hoping others with Sigma Art lenses can test this as well.



Aug 11, 2015 at 11:41 AM





  Previous versions of therealthings's message #13145454 « A7RII and Canon lenses AF compatibility »