I found this site review: high-ISO performance ? Nikon 750 vs Nikon D4S / D4 / D810 / D610 - Tangents comparing the noise levels of the D4s/D4/D810/D750 and the D610.
I was surprised how well the 610 held up up to 6400 ISO.
Here is the link to the actual RAW files in case you missed it in the main article. Index of /tangents/images/camera/nikon/RAW-files
I was surprised how well the 610 held up up to 6400 ISO.
Here is the link to the actual RAW files in case you missed it in the main article. Index of /tangents/images/camera/nikon/RAW-files