I was curious if anyone has thought of the following way to
> reduce image noise, in particular noise that comes from an
> electromagnetic source i.e. not light. The idea is,
> just cover most of the camera with tinfoil, everything except
> the lens of course. By this method, the only signal noise
> that affects the analog sensor elements will be of either
> internal origin (the circuits) or optical.
>
> But will it work? I haven't tried it, since I temporarily don't
> have a digital camera.
Buy a decent camera. Mine already has an aluminium casing.