>
> I don't think one can draw any such conclusion. Astronomers all use
> CCDs, not CMOS sensors, and astronomy works right up against the
> theoretical limits.
>
Actually CMOS chips are being used more for astronomy and they cost
less too. I did lots of astrophotography and used CCD chips. You
always took dark frames to subtract out the noise, the CMOS chip users
rarely took darks. Their photos, though, lacked the snap of a ccd
image, but they were smooth looking and still very nice. I noticed the
same when I went from D100 to 10D and now to E1. I like the snap of
CCD not the smoothness of CMOS. Where I still like my Canon is for the
long FL IS lenses and faster <f2.8 lenses for indoor sports. I like
the way the E1 in camera processes. I got tired of always having to
play with WB and sharpness with the 10D for what anyone would consider
snapshots or family. I like just setting the camera up and then
getting "usable" shots when I am just tinkering.
but that is just me lazy by nature I guess
Regards,
Brian
> And gain per se does not cause or cure noise. Noise in digital
> cameras is mostly due to self-interference from all the digital
> logic, and of course to the need for low cost everything. Including
> the amplifiers. CMOS sensors have lots of digital logic right on the
> chip.
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