Lately I am seeing an increasing number of people shooting at 1/40 rather than 1/50. Personally, I have always gone to 1/50 as my standard. It defies my understanding of shutter speed but some people swear that 1/40 looks better. Which do you guys prefer? 1/50 sometimes suffers from banding under fluorescent lights; how does 1/40 hold up in this respect?