And the image isn't enough pixels.
Indeed.
Somewhere, I have a goregous B&W print of a picture someone else took,
showing me getting onto a city bus in the middle of winter. (The
reason this is an interesting picture is irrelevant here.)
I don't recall the exact size; in my memory it's something close to
6"x8". Lovely fine detail, obviously done by someone who knows how to
take high-depth-of-field shots and process them right. But I have
trouble imagining getting a print that good out of digital with
anything less than at least 500dpi resolution, probably better.
Digital cameras with 3000x4000 pixel resolution might exist, but they
probably are even rarer than whatever the guy who took the shot used,
and surely far more expensive. And good luck finding a way to print
the result in that kind of detail; it's the rare printer that can print
greyscale without diterhing, and if that print is dithered it's got to
be in at least the low thousands of DPI for the print engine, and by
the time you're buying not only the camera but the printer to do that
you could blinkin' well _make_ a film camera good enough to take that
shot and maybe even one-off the film for it too.
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