Quote:
Originally Posted by digmo
So the Sigma would be good for music / gig type photos whereas the Canon would be a good general out and about lens.
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Yes, although the 50/1.8 might be the best for the stage shooting.
The difference between f/2.8 and f/2 is one stop, which is a doubling of the light. Exposure-wise, that's the same as going from iso 400 to iso 800, or from 1/50s to 100/s. If you have the 50 f/1.4, f/1.4 is
two stops more than f/2.8. That would be like going from iso 400 to iso 1600, or 1/50s to 1/200s.