I am new to this forum, but Im sure I can get the answers to all my questions here. I am trying to take a picture of a hummingbird and stop the wing with clerity in the photo. I just dont have the setting right Im sure. My question is, if I set my shutter speed at lets say 1250 and my ISO at 400, will adding a flash unit help achieve what I want. I am using a tripod, and a shutter cable, and a 24 - 70mm f/2. 8 lens. Please feel free to correct what ever Im doing wrong.