Originally posted by loco Can you explain how practice at center point and recompose can improve your camera's AF ability to nail focus?
I'll take a stab at justifying using the AF center point and recomposing.... My first thought is if the lens is significantly sharper in the center than the edges. Personally, I am unlikely to routinely use a lens with this much center to edge difference. My second thought is if the scene has too many distractions to use multiple AF points and speed is critical, center focus and recompose will on average put the subject's framing equi-distant from the focus point.
Now the big limitations- if metering is locked in at the same time as focus, exposure may be adversely affected. And the real biggie, recomposing after focusing will
always change the subject to sensor distance. This is no big deal if the depth of field is adequate. But with a shallow depth of field like the circumstances shown in this thread, you are just asking for trouble.