shinksma wrote in post #16189740
As pointed out by MakisM1, you can get good high-ISO performance out of the T3i/60D/7D sensor, you just have to develop good technique for exposing (I can't say I have been terribly successful, but I am aware of the idea). The first thing is to slightly over-expose - yes, you lose a bit of the shutter speed you gained by pumping the ISO higher, but it helps lower the "noise floor" I guess.
Then use good noise-reduction tools in your editing arsenal. PP is where many of the gains are to be made in taking a "meh" photo and turning it into something "good" or "great".
The hope with the 70D/7DII/nextgenwhatever is it will match the 6D in higher-ISO performance, so that those techniques can push the images even further.
That's the biggest problem I have when people try to tell me that APS-C high ISO is nearly as useful as a FF camera, it really isn't. The only reason I shoot at higher ISO's is to either A) use a narrower DOF, or B) use a faster shutter-speed. So having to change either to allow me to ETTR defeats the purpose imo.
I do think you can get useable shots up to ISO 6400, but barely. I can shoot all the way up to 25,600 on my 6D and still get better results than my M at 6400 without having to ETTR, and I don't think it's that the 6D has less noise per-se, but that the patterns in the noise are much more pleasing to my eye. So even if the 70D still has the same noise as the 7D/60D as long as they've changed the way the pattern looks and gotten rid of the banding issues, I'd call it a notable improvement. Even the EOS M has been a welcomed improvement over my old T2i.