I love reading books on photography and in my readings I keep coming across this notion of a "native" ISO. I believe in the past Nikon's native (or lowest?) ISO was 200, while Cannon's native ISO was 100. This seems to have changed now as all the newer Nikon's are ISO 100. However, it almost seems that my D7000 photos at ISO 200 have been color profile and clarity than when I'm shooting in ISO 100. I have a feeling this may simply be psychosomatic on my part but there does seem to be something slightly different between the two settings. Has anyone else noticed better looking photos at 200 vs. 100? Or it this all in my mind?