I happen to have the opportunity to test the Sony A900 camera with the CZ24-70 lens, I have read with interest many discussions regarding higher iso performance of this camera. Can any of the professionals out there that are using this system give me some insights to the real world performance of this system at iso 800, 1600 and 3200? I have tested in a very limited way and of course find the level and nature of the noise (Chroma) to be much more (higher) noticeable than my current D3's. I am not so much trying to compare with the D3 but rather to find out from others that have real experience if the performance can be use at these levels when you see the final image or output? From my own tests I seem to be able with some further NR to get an ok image, that is to pixel peep at, the images above 800 do seem to lose more sharpness than I am use. I am shooting RAW and have all NR turned off in the camera, I am trying the files in the latest C1 and Aperture, I am also trying Nik Define 2.0 and Noiseware for the NR.
Thanks for any advice and experience that you can share as I am very interested to see if the A900 can support my wedding work. Of course why would I change from D3's to A900 mainly the option of the CZ lens 16-35, 24-70, 85 1.4 and 135 1.8, I also think that the Sony flash as a great design.