Because I wanted to make something unique and truly awesome, I actually ended-up making the pinhole camera from hell!
OK, short description and story: I wanted to try and make an ultra telephoto pinhole camera with never before seen features. I ended up using a large cardboard tube as the body. That meant an 1841mm focal length on 35mm film. Angle of view was a measly 1.34°... so I needed a special viewfinder which I crafted using some spring hinges and MDF. It worked just like on the old folders, only the target at the end of the tube was smaller than a 35mm frame. Tripod mount installed at the center of gravity. Rotating camera mount with Nikon bayonet made from PVC and MDF. Pinhole made from a soup can lid (probably the best pinhole making material I've come across). Magnetic neodymium pinhole holder for easy interchangeability. A pretty incredible sight.
First, how do you carry a six foot long tube? Not that it's heavy in any way but it's dang cumbersome.
For that focal length, the correct pinhole size gave me an f/923... super dark. In full sun, I had a 15 second exposure on 320 ISO.
Then, there's the vibrations. Just breathing next to the thing sent it shaking like crazy. My tripod head was always slipping because of the leverage.
Also, there was the viewfinder's precision which wasn't that great and simply got worse when I accidentally dropped the tube. The cardboard got ripped by the shear force put on the viewfinder. The epoxy held-up great, it's just the cardboard that didn't fare so well. So now, I was shooting using a found rubber band to hold it all in one piece, getting strange looks from everyone...
Morale of the story: super sized pinholes with super long focal length and small apertures are not a good idea.
Hopefully, this won't be a total fiasco and I'll have a few color shots worth showing.
But at least it was sunny and warm...