I just got a groundglass/fresnel set to put in my old Century Master studio camera. The fresnel and glass are about 4mm too long and 2mm too wide to fit. How should I go about trimming them? Is this something the glass cutter at a frame shop could do, or do I need to take it somewhere that specializes in glass work? Or does this need to be filed down with a grinder of some kind? Of course, the fresnel is plastic.
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