02-28-2019, 10:46 AM
Inifinity is one thing, but how many times would one want to focus at infinity with an ultra wideangle? That'll probably just net a big "empty" shot with lots of small distant things. 
I find it too difficult to find precise focus in MF anyway (for example when focusing in a light so lousy that AF refuses to lock on) - I tend to rotate it back and forth for a long time, many times just missing the correct distance and getting to where things are softer again (not helped by the fact that it usually takes a tiny rotation of a focus ring to throw things far out of whack). When I'm using MF it's usually when I let the camera/lens AF once and then turn off AF to keep the focus distance put lest the setup starts trying to refocus, thus wasting time (for example, when shooting fireworks).
I find it too difficult to find precise focus in MF anyway (for example when focusing in a light so lousy that AF refuses to lock on) - I tend to rotate it back and forth for a long time, many times just missing the correct distance and getting to where things are softer again (not helped by the fact that it usually takes a tiny rotation of a focus ring to throw things far out of whack). When I'm using MF it's usually when I let the camera/lens AF once and then turn off AF to keep the focus distance put lest the setup starts trying to refocus, thus wasting time (for example, when shooting fireworks).