« on: February 05, 2012, 02:19:30 PM »
Do FF cameras perform better in low light conditions such as in a high school gym or at an outdoor stadium at night? Would a 5D Mark II be my best choice for upgrading from a 40D? I was considering a 7D, however, I have read a couple of entries on this forum where it is mentioned that the 7D is not as clear as the 40D.
The 7D out performs the (still quite good) 40D in every way. But people have a tendency to compare images at 100% in PS. They fail to understand that higher resolution at 100% = greater magnification of the APS-C or FF image. At a target print or screen size the higher resolution image will be better even though it may look "worse" at 100% where any softness, blur, or noise is magnified more.
The 5D2 has about a 1 to 1.5 stop noise advantage at high ISO (i.e. 3200, 6400). I don't find this to be noticeable in small and medium prints. ISO 1600 and 3200 are perfectly usable on the 7D. I've printed plenty of ISO 3200 8x10's from HS gym basketball games and they are clean. The few 16x20's I've done do show some noise, but they're still very good prints.
The 5D2 would show an IQ advantage for a 16x20 under gym conditions, but I'm not confident the AF would hold up. Nor do I think I would trade 8 fps for 1 stop lower noise.
FYI, in a gym I generally shoot my 85 f/1.8 at f/2 or f/2.8 with ISO ranging from 1600-3200.