when you might actually need to shoot something wide open at 1.8 because its dark outside, the AF cant focus for SHIT. just nosily whirrs around endlesslsy. Sure i can try to focus manually, but come on. does the 50 1.4 focus more accurately than the 1.8? and please dont suggest the 1.0 or 1.2L. i can only wish i had 1500 bucks to blow on a prime like that.