help! How do I calculate f-stop scale on a copal 0 shutter

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Originally Posted by Andrew

and Copal shutters have TWO scales so, if you transfer one scale you should get one correct scale for each set of lens cells ?
so long as the Nikon unit doesn't have some weird Nikon specific modification...

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There is one problem with the Nikon versions, their aperture scales are printed directly on the main aluminum strip that surrounds the whole shutter, and not on the two smaller strips held with two screws each as in other lenses. There are also no screw holes in those places - the threads may be below that main aluminum strip, but are not directly accessible. Not an insurmountable problem - for a temporary solution one could use double-sided sticky tape to hold the old shorter aperture scale in place.