I'm relatively new to LF and have just embarked on the adventure of buying an “in barrel” lens for cheap with the intention of fitting it into a shutter. And some questions have arisen that I should have thought of a while ago.

It has just occurred to me that I don't know how (or even if) the aperture scales on LF shutters are calibrated. Since many different lenses might fit on a Copal #1 (for example) with many different focal lengths, how does one get the scale right for a given length? Or, in the case of second-hand lenses how can one be confident that the scale on the shutter currently on the lens is correct for that lens?

Any wisdom gratefully received.

Keith