1964 Ford Thunderbird

Looks like it turned out well! I did that too and it was an interesting thing to do ... once! :-)

I thought it was very fascinating to go back 150 years to the beginnings of photography and make my own Calotypes. Still fascinated after all these years and I'm trying to design an 8x10 pinhole camera that will use whole sheets of photographic paper. My main problem is how to build it so that you can take more than one image in the field - a way to reload another sheet of paper without exposing it.

www.amazon.com/Primitive-Photography-Cameras-Calotypes-Alternative/dp/0240804619

This book has plans for entirely home-made cameras, and calotype photosensitive paper.

That's a great looking book! If I ever get the spare money, I would buy it. Thanks for that link.

What you need is 8x10 film holders like they use in the large format cameras.

www.ebay.com/sch/i.html?_nkw=8x10+film+holder

Interesting! Do you know how they work?

You load the film/paper onto the film holder in the dark room. There is then a dark slide that covers the film. once you place the film in the light tight holder ... you remove the dark slide and expose the film in the camera. The handle on the dark slide is black on one side for unexposed film and white on the other for exposed film. The dark slides hold two sheets of film. I think the 4x6 and 4x5 film holders are cheaper if you wanted to experiment with it. You would have to build your pin hole camera in a way that it would keep one side of the film holder light tight until you uncovered the pinhole. Medium and large format cameras use a spring loaded back to do this.

So, you can only get up to two exposures in the field using one of these? But, if you had a couple spare backs loaded, you could conceivably shoot that many extra shots, right?