I got newt25 to go on XP but I think it will be a lot easier to cut a 36mm mask out of cardboard, bang it inside an existing filter and shoot some flats to see what happens. I'm sure the tak @ F6, F8 will be fine but the newt is @ F3.8 and if I ever do splurg and get a 2" Wynne corrector, it will drop to F2.7.
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