2 Focus questions. AF-ON vs. shutter release.

Started Jan 30, 2013 | Discussions thread
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asultan
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2 Focus questions. AF-ON vs. shutter release.
Jan 30, 2013

1)

I am experimenting with AF and had a question regarding AF-ON Only (delinking focus from shutter release) and shutter half-press for acquiring focus. Is AF-ON only better than the shutter half-press? It seems that AF-ON is more steady and once focus is acquired, it waits until shutter is pressed and the picture taken. On the other hand, shutter half-press tends to focus repeatedly (at times) until photo is taken even when shooting stationary objects and alot of times focus ends up at a slightly different place (as demonstrated by the DoF meter on the barrel of the lens) Is this coincidence or does this difference actually exist?

2)

Is Live View equally sharp across its focus areas (centre, left, right, wherever) as opposed to the Viewfinder which is centre best, edges weak?
Thanks.

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