Originally Posted by
Greg
I've had shutters that the curved open "hole" that the aperture pin traveled along in limited the widest and smallest apertures. On one of these shutters. I increased the size of the curved "hole" and intern increased the widest aperture and decreased the smallest aperture. Did it very carefully with a Dremel bit and a small vacuum hose picking up the metal shavings. Shutter was clamped in an X-Y table vice under a small hobby drill press. Trick was to go really, really slowly wearing a pair of close up glasses. Took me a few tries on plain pieces of sheet metal to get the hang of it.
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