Quote Originally Posted by Peter De Smidt
Just make sure that the lens fits into a shutter, if that's what you want to do. Some do, some don't. At F64, I doubt a shutter is really needed, though. Do ULF shooters tend to use lenses in shutters?
All of the Computars that I have seen screw directly in Copal shutters, the 210mm into a Copal 1, the 240, 270 and 305 Computars into a Copal 3.

All of my Computars are in shutters. Some ULF shooters use lenses in barrel mount and that is practical for some applications, but most of my exposures are in the range where a shutter is very useful, say 1/2 to 1/30 of a second.