I often use my canonet in really, really low light conditions.
(3200 iso, 1/30th, wide open just barely works.)
When it's that dark, I don't even try to focus, I just guess the distance and use the viewfinder to compose the shot. The shallow DOF at f1.7, combined with bad guessing, means that many of my shots are slightly out of focus. (or way out of focus, depending on how many pints I've had) I'm usually trying to get an interesting image rather than a "good photograph", so focus isn't terribly important.
If you're using a flash and a smaller aperture, you might be able to get away with guessing the distance.
Last edited by CleverName : 12-18-2004 at 11:00.