Every now and then I want to make an aperture out of black construction paper or perhaps some black-core matte board to use on an experimental lens (meniscus) that has no aperture. Obviously, cutting the outside of the blank is not terribly problematic, but getting a perfectly round aperture hole in the center of the blank, of a specific size, is difficult. I know you can purchase a set of hole punch dies but I have been hesitant to purchase a set (ebay) because it may not include a size that I may want or need in the future.
I usually just use a very small pair of scissors and after a few attempts I have a usable round aperture...but would rather find a method that is less labor intensive and less frustrating.
Any suggestions?
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