Originally posted by Chris Mak Still there is a difference, the images seem to have a wider scope at default, and more often only need brightening up with the exposure tool (I use CO1), whereas the Apsc images need more fiddling around with shadow raising or highlight reconstruction and such, which tend to need all sorts corrections e.g. color wise. Although I could capture quite a large DR with the K5 at iso 80, there was always some sort of sense of compression at default, and colors not really evenly saturated, just needing a lot of work to get a pleasant and natural looking image.
Is that really an APS-C vs FF issue? Or is it merely a camera issue, the raw defaults in each camera?
The best color output I've gotten from any digital camera with raw files came from the Olympus EPL-1, easily the worst digital camera I've ever used. Even well exposed images at base ISO from that camera were noisy. But the colors were often quite impressive, even with kit glass. The Olympus EM-5 produces much cleaner files, but something is lost in the color in its raw files; and, oddly enough, that something can be difficult to replicate in post.
Something of the same sort could be said when comparing the raw files from the K200D to those from the K-5 series of camera, although the differences here are much more subtle. The K200D produced default raw files with colors slightly more vibrant than what I could get out of the K-5, although the K-5 produced slightly cleaner files (and more than slightly at higher ISOs).
Now from these experiences, I would be inclined to suspect that the better colors from the Sony A7r have more to do with the camera than with sensor size. Keep in mind, the raw defaults in Pentax cameras will be optimized for the color rendition of Pentax, rather than Zeiss, glass; whereas the Sony A7r's raw defaults would be optimized for Zeiss color rendering. So it should not come as any surprise that Zeiss glass would seem to produce better colors on a Sony high-end camera than on Pentax one.