Quote Originally Posted by polyglot View Post
I reckon an 8x10 would possibly be easier to build, but holy cow 8x10 film is expensive. I would personally go for 4x5 with a slot to suit the normal 4x5 double-sided holders. The bonus there is that if you do it right, you could even put a rollfilm back on. Or maybe 5x7 since that's a common paper size and a reducing back for 4x5 won't look completely silly on it.

I would seriously consider making it a zoom, i.e. have a simple sliding-box arrangement (or bellows if you're extremely keen) so that you can change the position of the pinhole wrt film and therefore field of view. Of course the pinhole itself needs to be quickly replaceable to deal with size changes. And if you get that far, you've built a complete LF camera - replace the pinhole with a shuttered lens and there you go (GG for focusing optional).

Obviously you want a tripod thread in the bottom.
Hence why I wanted to start with paper!!!! I have to admit that I hadn't seriously thought about film usage, but was just trying to cover all bases, in case. When I started looking last night, I had thought about the Ilford direct positive paper, but I see there are supply problems with the RC variant, but that is something I could look at in the future.

As for the sliding box, yes, that was going through my head (at around 2am this morning....dammit. Have I ever said I over think things!), but I thought for a first off, I would keep it simple. Bellows is another project (for another time).

Tripod mount - yep, that was a given and shouldn't be hard to cater for.