In dimmer light, using longer exposure and low ISO will put the noise at
very low level even with the C5050's tiny sensor without noise reduction
enable.
C.H.Ling
----- Original Message -----
From: "Joe Gwinn" <joegwinn@xxxxxxxxxxx>
> The theoretical limit of the "Ideal Observer", achieved in scientific CCDs
anyway, is to be limited only by shot noise in either the photon flux
falling on the sensor, or in the electrons collected by that sensor. These
both follow Poisson statistics, which I described some time ago. Basically,
the standard deviation of the noise is equal to the square root of the
average level. This is inescapable, arising from the physics of light and
of electron devices. So, to achieve a given signal-to-noise level, one
must collect a certain number of photons (or electrons) per pixel. In
bright light, a small pixel can do this in a reasonable amount of time. In
dimmer light, the pixel must be larger, or one must accept a more noisy
image.
>
> Joe Gwinn
>
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