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Re:larger sensor = better S/NThere is also the issue, for CCD's anyway, of charge bleeding from one site to another. That effect will increase as the pixel density and light-gathering increases. But again I don't know if it's an important effect in practice.
I think on the D70 you can observe charge bleeding if you try to shoot directly (or nearly directly) into the sun. Here is an example. I imagine this would probably occur on most CCD based cameras.
Unfortunately I don't know of any "regular" CCD cameras that give you more than 8 bits per color channel.
Actually, as far as Nikon goes, all of their CCD based dSLR's capture 12 bpp per color channel, the D70 included. But, you will only get this data out of the camera when you shoot in RAW format. Shoot JPEG and the data is lost as you're limitted to 8bpp with JPEG. I *think* Canon's dSLR's, including the Digital Rebel, can also do this - of course they are not CCD based but CMOS based.
I thought that CCD chips were something like 50 times more sensitive to light than film.
Not sure about this. I know on a D70, the minimum ISO is 200. This means that taking into account the filters placed over the CCD, the sensitivity of the sensor is roughly equivelant to ISO 200 film. At higher ISO's you aren't making the sensor more sensitive, you are actually just amplifying its base ISO 200 signal which is why more noise is apparent in the resulting picture. In any case, I know that some CCD based cameras start at ISO 50, so to a large degree it probably largely depends on the strength of the filters being used, but this is a topic that I really don't know that much about.
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Re:Quiet Town?
