02-23-2016, 02:24 PM
(This post was last modified: 02-23-2016, 02:26 PM by Brightcolours.)
Most detail is in the green channel, for our eyes. That is why Bayer and whatever pattern Fuji uses put the emphasis on green.
But, contrary to what some believe, the red and the blue pixels in Bayer and Fujiwhateverpattern also contain detail (luminance) information, which every good RAW converter "extracts".
For them, only pure red to black and blue to black subjects only will be half the resolution, every other mix will show higher resolution. Same for Sigma with pure green to black and pure red to black then.
Sigma/Foveon is forced to go for blue, as it samples first blue (tainted with the whole spectrum of light), a kinda green after that (tainted with the whole spectrum minus blue short wave lengths) and finally a yellow (which has lost 2/3rds of its photons along the way already).
After that they need to do a lot of calculating to end up with cleaned up blue, green and red values.
All that loss of light is the reason why the "high" ISO results are so noisy.
But, contrary to what some believe, the red and the blue pixels in Bayer and Fujiwhateverpattern also contain detail (luminance) information, which every good RAW converter "extracts".
For them, only pure red to black and blue to black subjects only will be half the resolution, every other mix will show higher resolution. Same for Sigma with pure green to black and pure red to black then.
Sigma/Foveon is forced to go for blue, as it samples first blue (tainted with the whole spectrum of light), a kinda green after that (tainted with the whole spectrum minus blue short wave lengths) and finally a yellow (which has lost 2/3rds of its photons along the way already).
After that they need to do a lot of calculating to end up with cleaned up blue, green and red values.
All that loss of light is the reason why the "high" ISO results are so noisy.