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p.1 #9 · p.1 #9 · AF inconsistency with 85L II and 1Ds3 (UPDATED with examples) | |
memoria wrote:
I've noticed that my 85L II behaves a bit inconsistent on my 1Ds3 body compared to my 5D3. It's not a back or front focus issue since I've very carefully MA:d it using both Dot Tune technique and Reikan Focal for accurate values. When locked correctly the focus is really spot on. But that locking thing is puzzling me. Either it's dead on or completely off (like nothing is in focus). The solution is to repress the AF button like crazy and there will be keepers. I don't have the same behaviour on my 5D3 so I'm beginning to think something is up with the 1Ds3. But then again, other lenses seem to do OK on it - even my 50L is more consistent.
What's your experience with the 85L? Consistent all the way through?
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Not sure if this will help, but check for dust bunnies on the AF sensor, or just blow out the mirror box region. A similar thing happened to me a while ago. Easy fix, but if doesn't help then expect a more complicated problem. Another possibility is the use of fluorescent lighting with FoCal, it flickers at a high frequency that isn't detected by the eye.
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