Another interesting aspect of digital shooting is that you can "choose" the
"length" of your "roll of film." I can buy a 32, 64, or 128MB SmartMedia
card for my camera, for instance. Shooting at the maximum pixel count in
Super-High-Quality (lowest level of JPEG compression), you get 27 shots on a
64MB card, 54 shots on a 128MB card. If HQ (somewhat more compression) is
good enough for you, change that to 81 shots and 162 shots, respectively.
Shooting web-only quality, the numbers go up into the multi-hundreds per
card.
I use a 64MB card at SHQ, which yields 27 shots. But, interestingly, this
supports MORE shooting that a 36-exposure roll of film, because you're
deleting failures as you go along. My rough estimate is that for myself, a
27-shot card supports about the same amount of shooting as 2 rolls of
36-exposure 35mm film.
And if you're really interested in a "long roll of film," the new Olympus
E-20 supports the 1-gigabyte IBM Microdrive card. I'm not sure exactly how
many SHQ shots at 5-megapixel size this would store, but it's something like
300+. See:
http://www.dpreview.com/news/0109/01092002olympuse20n.asp
(And note that 35-140mm f/2-f/2.4 lens. You won't see anything like that on
a film camera any time soon. <g>)
--Mike
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