Quote:
Originally Posted by Dave
Re 50mm, although opening up to a max of f/1.8 will give plenty more light, you'll need to be wary of the incredible shallow DOF at these levels. Fine if the subject/s are on the same focal plane & you are pin sharp with focusing, but otherwise it could make life harder.
Saying that you could get some pretty decent isolation of subject if done right 
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Suggest next stop down from f/1.8 anyway ... lenses rarely perform best at the very max or min apertures
