Peter Figen Offline Upload & Sell: On
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p.1 #8 · p.1 #8 · Will micro adjustment affect both kinds if autofocus? | |
"If I manually focus in Live View, then switch to Autofocus, the sharpness degrades a little bit. Just a little, but noticable. The problem is worse with my 70-200 F4 II, much less with my 24-70 f2.8 and 100-400 II. Is it a correct assumption that it is a lens issue, and should I sent the lenses in for inspection? Or is there another solution to try. Thanks so much for you help!!"
If the image is "degrading" compared to manual focus, then it's almost entirely in the AF system and this is just what AFMA is for. You need to determine if the autofocus is putting you in front of or behind where your manual best focus is, and you have to make sure you're using a single AF point and it is indeed placed over the point of desired focus. On top of that, you need to take a bunch of AF sample photos as there is always some variability in autofocus even when the camera is locked down and the subject is stationary. You'll get a feel for what is best pretty quickly. I like doing this tethered to a computer and immediately looking at the images at 100 percent view.
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