« on: November 10, 2014, 03:42:24 PM »
Maybe it's just from the CFA filter having been made even more color blind.
The low color measurement on DxOmark does seem to indicate they may have picked up a little QE from a looser CFA.
I don't think one has to do with the other. I've been told in the past that the QE modeling approach makes it effectively ignore the CFA.
Agreed. I believe the Q.E. is referring to the actual response of the silicon itself (that's usually how sensor manufacturers report it...as the silicon's response to light). That is the Q.E. of incident photons that make it all the way to the sensor.
So, to be clear, that means that even if you had a 100% response in the silicon itself (at 565nm, green light...the Q.E. is usually for green light), you could still increase overall light gathered by improving your filtering, or by eliminating filtering and going with MCS, or by improving microlens design, or by using ISOCELL in a BSI design, etc. Anything that increases the incident photon count at the photodiode will still increase overall efficiency...for whatever Q.E. you have.
well if they screen out the entire CFA effects then the 59% level seems even less believable