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EF-M Adpter: Focus problems

Started Feb 14, 2021 | Questions thread
OP Robert Seetzen New Member • Posts: 13
Re: EF-M Adpter: Focus problems

TrackDayLT4 wrote:

On my M5 in one shot mode, I have a couple of adapted lenses that front focus.

I believe this has to do with how the dual pixel autofocus calculates a focus distance and tells the lens to move. In one shot mode with adapted lenses, it dos not appear to confirm focus. This problem goes away using Servo instead of One Shot.

Try repeating your test with Servo and see if the focus improves.

Cheers

Thanks for your tip! It's Monday and quite a lot to do, so I had very little time to do a few comparisons between One-Shot and Servo. At first glance, I'd say that there is little difference, though I didn't check with 'scanning' negatives, where the problems were most obvious.

I'll tell more as soon as I have the time to do some more meaningful tests.

 Robert Seetzen's gear list:Robert Seetzen's gear list
Canon EOS 70D Canon EOS M50 Sigma 50mm F2.8 EX DG Macro Canon EF-S 18-135mm F3.5-5.6 IS STM Tamron 18-200mm F3.5-6.3 Di II VC +3 more
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