tkbslc wrote in post #11477264
How do you figure? I'm not seeing any meaningful differences at any aperture between the 7D, D700 and k-5
I assume that by aperture you meant ISO?
Well, the sensors used in the K5 and Nikon D7000 have extremely low read-noise, which means that much more detail is captured in the shadow portions of the picture. This means that you can successfully recover a picture even if it's severely underexposed (say, 5 or 6 stops). If you try doing something like that with a 7D, you'll get major banding.
Apart from the ability to recover underexposed images, the low shadow noise also results in better dynamic range, since you can lift the shadows in an otherwise well-exposed image without much increase in noise (in the dark areas). This means that it is less necessary to resort to HDR when capturing a scene with a lot of dynamic range.
These new sensors are very good at high ISO as well...at least a match for the latest APS-C Canon sensors. Dpreview has stated that RAW files from the K5 are quite usable up to ISO 25,600 when exposed properly. Imagine that...usable ISO 25,600 from an APS-C sensor!