Now Sony Alpha 99,65,77 and others can autofocus with EVERY open aperture in video mode (easy hack):

Started Nov 8, 2012 | Discussions thread
success100
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Re: Let me see if I have this correct...
In reply to aardvark7, Nov 8, 2012

aardvark7 wrote:

You want me to take my expensive fast aperture lens and glue or bend the aperture actuator so it's permanently fixed wide open????

Seems like a hugely expensive solution to a problem that most videographers wouldn't recognise. As I understand it, manual focus is the normal procedure for high level videos and isn't affected at all by aperture.

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2012 : My new year's resolution -
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well, you dont HAVE to. but for someone thats got an older minolta 1.7 when you can get another one for under $100, it may not be a bad trade off.

if i could shoot AF at 2.8 then I would love to. But im not willing to risk my 16-50 either.

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