frugal@xxxxxxxxxxxxxxx writes:
<< Having missed the original discusion, I wonder if there's any possible
fix for this. Maybe a curved sensor or something. Or, if it's a problem
with CMOS sensors too (probably). Idealy, I'd like to see a digital back
for the OM cameras. If it were feasible (given the optical issues), it
woudl be a great way to bring back the OM system.
>>
The supposed issue here is that as the pixel size gets smaller (larger # of
pixels total) . the 3D structure needed to do color filtration on the sensor
chip, lands the active sensors deeper and deeper down inside a narrower and
narrower hole. For a wide lens exit pupil this leads to light loss and the
light loss may be wavelength dependent causing color shifts as well. (bokeh
is wavelength dependent! )
The filtration/metalization/pixel size issue is probably much the same for
both CMOS and CCD. However, some of the newer chips use microlenses mounted
at the entrance of each pixel. This may make this a non-issue, although the
micro lenses also add some light loss of their own and probably also have
some acceptance angle limit for light.
Regards,
Tim Hughes
>>Hi100@xxxxxxx<<
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