#impossiblelandscapes

Here's the link for the 35mm pinhole camera I've been making (I'm most of the way through a foamcore version) (previously posted here with other pinhole research, including aperture logistics): http://photo.tutsplus.com/tutorials/the-ultimate-guide-to-create-your-own-35mm-pinhole-camera/ But this time I'm thinking of doing something a little different... winding a whole roll of film through, during a single pinhole exposure, to make impossible landscapes. I have a single roll of unexposed-and-developed film hanging up in my studio (all I ever wanted are the memories, says a slip of paper pinned with it) and keep thinking of making something, well, bigger.

Thoughts of a servo evolved into thoughts of a DC motor (some here).

Okay, so, a spindle is about 9mm dia (circumference pi*d, 28.28mm) and a regular frame is 36mm wide (35mm film is 35mm tall, including sproket holes)(dimensions source). So 1 revolution winds .75 of a frame of film. So if I want a frame to be exposed for 20 seconds, I want 4/3 revolutions in 20 seconds, or 1 revolution in 15 seconds.

I figured it would be slow, but wow, that's really slow. A planetary gearbox will be my best friend. (Here's one I could buy, but it's not slow enough.) And I still want adjustable speed. Maybe it'll be a 4 second exposure (1 revolution in 3 seconds), but maybe a 40 second exposure (1 revolution in 30 seconds).

So it may become build-your-own-gearbox time. And here I thought I just wanted to make photos. Instead I end up researching endlessly and making my own rigs to make photos! Though I do admit to buying a RAM mount to put a camera (or anything with a tripod mount) onto my car's rearview mirror.