> But then, isn't film inherantly noisy too?

Not really, not in the way digital image sensors are.

> Heh, not even DCT artifacts? :-P

No, just some banding in the sky due to you effectively losing the last 2 
least significant bits of data.

BTW, on a lot of digital cameras now you can save your images in "raw" 
format, which is usually 12-bit per channel.  That way you can make your 
colour/contrast/brightness adjustments and still have the full 8-bit output 
possible without any loss of a bit or two.

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