in reallity i have found that the amount of noise reduction the 18MP crop sensor takes at iso 1600 is about equal to the amount iso 16,000 takes on the 5Dmk3
I understand that the 5D3's Digic 5+ is better at noise reduction than the 7D's Digic 4. But, isn't this only for the JPG's out of the camera? When working with RAW images from both camera's, it was my understanding that the noise levels are much closer giving the 5D3 a mere 1.3 stop advantage. Not true?
also 1/30 sec without flash?
gonna struggle with subject blur there
Sometime, yes. Obviously, I prefer faster when light and subject allow it, but 1/30 second works for many candid moments that don't involve physical activity -- as long as camera movement is controlled with IS or other means.
DoF is gonna be a wash between the f2.8 crop and the F4 full frame
I like my 17-55, but the fact that DOF is slightly smaller with the 24-105 on a full frame body is one of the things that intrigues me about this lens -- it's wider, longer, cheaper, and real 'L' lens.