hi Barry,

I've used blackout curtain material, which is available at any fabric shop (used to line window curtains) and is inexpensive (about $5-7 a yard as I remember). The only problem is that it is mainly available only in white, so you need to add extra layers --I added a black sheer layer on the inside, and a thin red nylon on the outside for my Kodak 2D. All layers glued well, nylon though probably the worst of the bunch. Recently, I've found similar curtain material in colors, including black, which will remove a layer --but it is a bit more expensive --about $20/yard