I've taken a Copal 3 with proper aperture scales for the Schneider S 360mm f:6.8 lens and put lens cells from a barrel mounted 355mm G. Claron in the shutter. The distancing of the elements in shutter matches the old barrel mount exactly. Given the fact that focal lengths of these two lenses are less than 2% different, would the aperture scale then be correct the way it is? It is hard to compare the apertures of the barrel mounting with the Copal 3 since the barrel mounting aperture opening is much more star shaped as opposed to the relatively round hole on the Copal 3. Thanks.
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