Earlier, we saw indications that the Sony a7RII was doing spatial filtering of raw images at ISO 32000 and above. In such situations, I find it instructive to look at spatial frequency graphs. Assuming that some of you do as well, here is a graph of the horizontal and vertical spectra of a 1000×1000 pixel… [Read More]
Archives for August 7, 2015
Nikon D810 vs Sony a7RII dark-field noise
Some of you asked for this: The red, green, and blue raw channels are all on top of each other. The D810 curve is the one that starts at ISO 32 and goes to ISO 50K. The a7RII curve is the one that starts at ISO 50 and goes to ISO 100K. These curves are… [Read More]