Quote:
Originally Posted by bojan
JA, total number of photons delivered to the sensor (as a whole) is irrelevant for exposure time etc... what is relevant is photon flux per pixel (or flux per mm^2) and that will be the same for the same lens (including f/ number).
ONLY difference with different sensor size will be the field of view.
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Well
I think I kind of got that 
, since I emphasised for the sake of completeness
virtually exactly that earlier,
when I said:
Quote:
Originally Posted by JA
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It should be noted however: that the light per unit area (of sensor), and hence the exposure, on both sensors will/can be the same, BUT the Total light delivered to the sensor, if you could count the number of photons delivered to the sensor, will NOT be.
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Best
JA