What materials do folks use for septums and darkslides, and where do you get them? I'm looking at having to make some holders for my 12x15 camera, and I'd like to get a source for the materials.
Good-ol' black mat board for yours truly. My DDS film holder for my 20 inch pinhole is made of black matboard, 1/4-inch plywood, black felt, and held together with Titebond and gaffer tape.