Quote:
Originally Posted by Peter Ward
My understanding is fill factors are always less than 1. Fill factor is simply a percentage of a pixel than can "see" light compared to the bits of the pixel (gates etc.) than can't.
You can improve fill factor by having bigger pixels, smaller gates and micro-lenses.
Sony's QE's I don't believe are anything like 70%. QE is a strict ratio of actual flux to detected flux. Sony sensors bleed both noise and charge so the signal might look clean, but is also reduced in the noise reduction process.
I understand their real QE to be about 30%. Sony only quote "relative" QE specs... a complete waste of time unless all you are concerned about is colour balance.
Don't believe me? Try this easy test: Shoot though a 7nm SII filter with a DSLR. I suspect the you'll find the results will be very sad...  |
Thanks for that. I got the wrong term. Yes relative QE is what they quote. So that means QE relative to different colours?
A bit like Kodak quoting QE for RGB in one shot colour sensors?
I found a definition - not totally clear but here it is:
http://www.acronymfinder.com/Relativ...ncy-(RQE).html
So it would mean here some portion of the light radiation hitting the sensor. Presumably the red separately from the green separately from the red. but not the IR or UV.
Greg.