Get Sony A7 cameras at B&H Photo.
This elaborate real-world evaluation of noise includes:
- HD and UltraHD entire-frame images ISO 100 to ISO 410K in RGB comparing the Sony A7s to A7R, matched accordingly.
- HD and UltraHD entire-frame images ISO 100 to ISO 410K in grayscale gamma 2.2 comparing the Sony A7s to A7R.
- Two large actual pixels crops from the Sony A7s, ISO 100 to 410K showing RGB, gray gamma 2.2, and individual red/green/blue color channels from ProPhotoRGB.
In my review of the Sony A7s:
The appearance of noise depends on the character along with its magnitude, and especially the degree of enlargement. Discussion on this topic is included.