Here's my situation - I had an acquaintance at work who DJs afterhours who invited me out to shoot him while he's spinning. The fastest lens I have right now is the 14mm f/2.5 and it was barely cutting it wide open. Quite a bit of hunting for focus and I found myself having to push the ISO way up (something I would prefer to avoid if possible). Since it was a small venue, I was jammed in the booth with him and the 14mm focal length was barely wide enough - that's the main reason I am leaning towards the 12mm since it would give me a hair more width to work with for composing shots. Can't use a flash, and I am trying to take advantage of the club lights for lighting but I need something faster than the f/2.5 lens. The 17mm isn't the optimum width, but it's a tad faster which is an advantage (or at least I would think) and I might be able to make 17mm work if need be. So, I'm after opinions on the 12mm f/2.0 vs 17mm f/1.8 for shooting in low-light at nightclubs and such. Should I expect as much hunting for focus out of the 12mm or the 17mm under these conditions? Is there going to be a significant difference between f/2.0 vs f/1.8 in this type of shooting environment? If both lenses were equal in image quality, would you go with wider (12mm) or faster (f/1.8)? I know the obvious answer is "Buy both!!!" :smile: but unfortunately the checkbook won't support that at the moment. Thoughts?