Quote:
Originally Posted by gregbradley
I assume fill factor is a number greater than 1 hence the high QE numbers Sony presents. Although fill factor you would think would be a number less than 1 (1 being the whole area??).
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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...
