Reikan FoCal AF-tuning of 2x Sigma 35mm/1.4 on D800

Started 7 months ago | Discussions thread
cm71td
Regular MemberPosts: 403
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I've found Reikan FoCal to be unreliable at 1.4
In reply to Daniel4, 7 months ago

Just a heads up.  I've actually had Reikan report a "good fit" at -18(!) on two different bodies, when in reality, a manual test reported the same lens needed 0 on one body, and +5 on the other.

My suspicion is that the Reikan "Quality of Focus" algorithm is thrown off by local CA.

In any event, I would strongly suggest doing a manual test just to make sure Reikan isn't the problem.

I've also heard that people have had better results using something other than the Reikan target.

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