I recently make a pinhole camera out of 3/8 inch plywood and found, somewhat to my surprise, that I was having troubles with warps and bends in the plywood. I had always thought that one of the pluses of plywood was that the plies canceled out the wood's tendency to warp.
Therefore I am wondering what woods, or wood-like products, others have found to be good for constructing a sturdy, light-tight box. Thanks, Bob
