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Just cut a hole in a piece of paper, and tape it over a wide aperture-lensaperture lens? See, for instance, this link and this link.
Just cut a hole in a piece of paper, and tape it over a wide aperture-lens? See, for instance, this link and this link.
Just cut a hole in a piece of paper, and tape it over a wide-aperture lens? See, for instance, this link and this link.
