I think I know the answer, but can anyone confirm: a typical modern LF shutter, such as a Copal, has detents on the speed adjustment that correspond to the marked speeds. I assume the speed is controlled by a tension spring somewhere in there, so if I set the dial in between detents, e.g., halfway between 1/30th- and 1/60th-second, will I get a 1/45th-second exposure?

Anyone know how this works on mechanical SLRs or rangefinders?