AF confirmation light...

alfaholic

Banned
Two days a go I photographed some baptism ceremony, for the first time as a favor to my friend who could not get there in time. There was some loud music in the background so I could not hear beeping even with loudest setting, and my D7100 struggled to acquire focus most of the time, which was very strange because I used f1.8 and f2.8 lenses at 4 afternoon.
But that is a different problem, I wanted to ask is it possible to make red light appear only when focus is acquired? I can not find that option, only to turn it on, off, or auto, but it does not indicate whether focus is acquired or not, and for the first time I noticed that it is misleading because I see the red light so intuitively I thought it focused, but the shutter would not release.
I know there is a small dot at the lower left corner that indicates AF lock, but that is not very convenient.
 
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