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Author Topic: Will this allow F8 focusing on 5DMIII  (Read 1397 times)

RGF

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Will this allow F8 focusing on 5DMIII
« on: April 21, 2013, 10:59:10 AM »
Just wondering if I placed a very thin 3rd party extension tube on the camera and then attached the lens/converters, would I be able to focus at F8 or higher?


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Will this allow F8 focusing on 5DMIII
« on: April 21, 2013, 10:59:10 AM »

neuroanatomist

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Re: Will this allow F8 focusing on 5DMIII
« Reply #1 on: April 21, 2013, 12:58:47 PM »
Depends on the lens, I expect.  I've tried stacking two TCs with a 12mm tube between on a 600/4 on my 1D X - only one is reported, phase AF tries and fails, contrast AF works with the 2x in back, fails with the 1.4x in back.
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Mt Spokane Photography

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Re: Will this allow F8 focusing on 5DMIII
« Reply #2 on: April 21, 2013, 01:01:24 PM »
Yes, it seems to work, depending on the lens.  My 100mmL struggles doing this, but others focus fine.  Of course, you can only focus on things that are close.

jon_charron

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Re: Will this allow F8 focusing on 5DMIII
« Reply #3 on: April 21, 2013, 01:47:31 PM »
The firmware that comes out in a few days will allow f8 focusing through the cross point sensors.

neuroanatomist

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Re: Will this allow F8 focusing on 5DMIII
« Reply #4 on: April 21, 2013, 01:50:18 PM »
The firmware that comes out in a few days will allow f8 focusing through the cross point sensors.

Not all of them, presumably just the center AF point with 4 surrounding points available as expansion (but not user selectable).
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RGF

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Re: Will this allow F8 focusing on 5DMIII
« Reply #5 on: April 21, 2013, 01:55:16 PM »
Thanks.

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Re: Will this allow F8 focusing on 5DMIII
« Reply #5 on: April 21, 2013, 01:55:16 PM »