>>2581670I did a similar thing to check focus on the lens was aligned with my rangefinder. Baking paper/tracing paper would work well but I used some kind of paper we use to make copies of maps. Same basic thing but it's way smoother. I've heard you can use certain kinds of tape too. I'll have to pick up some plexiglass! Any particular kind? Never used plexiglass before. Would it work to keep film flat while I scan it?