I need to know the specification for the mounting thread on a Zuiko f-3.5
20mm macro lens. I've heard it referred to as the Royal Microscope Thread
which I can't confirm. The RMS thread is the same as the ANSI Microscope
Objective Thread at a max dia. of .7941 inches and thread pitch of 0.027778
inches. The threads on the lens look very close to that but I don't have a
good way to check for sure. Can anybody tell me if that is the thread size.
/jnm
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