09-05-2016, 08:51 AM
With a DSLR body which has no AF micro adjustment, you could also go the "lens adjustment" way. If you wnat to do that yourself, you just need to buy lenses with a dock and software for it: Sigma or Tamron.
Or get a body with AF micro adjustments.
Or use LiveView with critical shots.
Or go mirrorless.
AFMA is a game to reduce the rate of fornt- or backfocus shots - it's not magic and it doesn't help always, no matter how much time you invest. you will miss less shots, but you still will miss some. I didn't figure out the reason why for different distances different AF values appear to be the right ones, but this makes adjustment of a macro lens with only one AFMA value impossible. With wide-angle, on the other side, the failure rate (= reliability) increases.
FoCal, what stoppingdown recommended, can nake great looking spreadsheets about the reliability of AF. Result (for me): I don't trust a system anymore which is not able to deliver constant results in an optimal situation - good light, tripod, maximum target contrast.
No, you can't use Reikan for Sony mirrorless or CDAF, but you can take pictures of a target like the one from lensalign or read this recipe Just be ready to deal with frustration.
FoCal does the same, on various Canon cameras it appears to be able to do it fully automatically. Maybe stoppingdown wants/can sell his licence? But if you have no possibility for AFMA...
Or get a body with AF micro adjustments.
Or use LiveView with critical shots.
Or go mirrorless.
AFMA is a game to reduce the rate of fornt- or backfocus shots - it's not magic and it doesn't help always, no matter how much time you invest. you will miss less shots, but you still will miss some. I didn't figure out the reason why for different distances different AF values appear to be the right ones, but this makes adjustment of a macro lens with only one AFMA value impossible. With wide-angle, on the other side, the failure rate (= reliability) increases.
FoCal, what stoppingdown recommended, can nake great looking spreadsheets about the reliability of AF. Result (for me): I don't trust a system anymore which is not able to deliver constant results in an optimal situation - good light, tripod, maximum target contrast.
No, you can't use Reikan for Sony mirrorless or CDAF, but you can take pictures of a target like the one from lensalign or read this recipe Just be ready to deal with frustration.
FoCal does the same, on various Canon cameras it appears to be able to do it fully automatically. Maybe stoppingdown wants/can sell his licence? But if you have no possibility for AFMA...