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Anonymous
>Does heat create noise during the exposure?
With digital it does. With film, the amount of grain is set. There's something called a reciprocity law failure that comes in with long film exposures, but I have no clue what it is.
If you're looking for an old film SLR and willing to shell out Leica cash, get an SL or SL2. Their reputation for insanely bright viewfinders is true; a couple weeks ago I was in one of those hardcore small local photo stores, and an SL2 was just left lying out on a counter, randomly. I picked it up, looked through the viewfinder, and metaphorically came.
As for the DSLR bulb setting thing, I don't know.
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