Quote:
Originally Posted by rustigsmed
just a quick one Ray,
with dslr's - is it really QE that the sensor is reduced due to the bayer matrix or is it more accurately defined as a loss of resolution?
cheers
rusty
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Hi Rusty.
The job of the Bayer filter is to absorb about 2/3 of the photons that hit it. Since the majority of the photons never make it to the underlying detector array, the sensor as a whole must have a QE below about 0.4, even before taking into account whatever the detectors themselves do. This is a huge hit to QE, but it is necessary to encode the colour data.
The Bayer filter also mucks up the luminance data, but debayering can fairly effectively disentangle lum from colour (essentially by smart guesswork), although there is still some loss of resolution and fidelity in the process (but not a whole lot).