I want wooden, not tin, hence the long winded planning process. I don't want the easy option this time!
My outer frame is currently resting for glue to dry (glue and nails, just in case! ) When it's all set solid (probably tomorrow afternoon) I'll finish the front and back plates. I will drill a large hole in the front plate, and attach a small piece of metal/aly foil with a fine pinhole to the back of that. The angle of view is calculated to be 90 degrees. The back will hold either 6"x4" photo paper, or 5"x4" film. I could quite easily set it up for panoramic use (by cutting strips of paper, or just cropping afterwards).
The inside will be painted matte black, and any cracks of light will be filled. Just to be extra sure, I'm thinking of applying strips of black fabric in the corners.
Holding the back on will be a mixture of flush fit (Well, I'll try! ) and some rubber bands for good measure. Of course it'll have a fancy carrying handle on top.
The wood I bought wasn't ideal, but it was all they had available, and I wanted to get started today. It'll do, but the Mk II will be even better...
Ah yes, araldite. Fantastic stuff. I thought about the scrap camera thing, but I thought it'd look messy. I think I'll just do the nut onto the camera body thing.