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p.1 #2 · p.1 #2 · AF fine tune..? confused to say the least :) | |
If you're getting consistently sharp focus in the areas you're focusing on, it probably doesn't need tuning.
The only way to know for sure is to carefully test it using a static subject and a tripod. You can use one of the test charts that you angle at 45 degrees and then focus on the midpoint to see how far off it is. Alternately, you could just shoot a series of test shots: shoot with the AF fine tune at zero, then shoot at +5, then at -5, +10, -10, etc. and see which one is the sharpest.
There are more sophisticated programs like FoCal which will automate this process for you.
If you aren't having problems... I tend to not worry about that kind of thing.
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