Micro AF Adjustment -- Would this work?

Started Feb 13, 2009 | Discussions thread
Ben_Egbert Forum Pro • Posts: 20,228
Re: Already Proposed at FM

Photonix wrote:

The mirror should work for alignment but you would need to remove it
when the photos were taken. This MF adjustment method relies on the
test image being exactly the same in each shot with all the detail in
the same focal plane. If left in the photo the reflection would
present a different scene each time and anything in the reflection
would also be in a different focal plane.

Good point, the mirror trick could be used for alignment, and then the hole covered.

I wanted to try the FM trick, but too cold to even think of going to my garage and trying to build it. Not sure I could get it square anyway.

The comment about being similar to the FM method was with respect to
the basic idea of using JPEG file size and a proper target to make MF
adjustment rather than the use of a mirror for alignment.

I have been checking my file sizes and get a pretty good correlation, but I don't have the correct control of content to rely on it. It is sort of a tie breaker.

Sorry for not making that clear.

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