I finally took some time this weekend to assemble a DIY pinhole camera based on Polaroid film. The camera is complete and operational except for a tripod mount which I will be addressing this week.
I decided to give the Impossible Project instant PX film a shot and experimented with the PX 600 and PX 100 films. The PX 100 is definitely not ready for long exposures, very grainy and poor image detail. The PX 600 UV+ film on the other hand worked really well.
A few results:
Camera Build Details
Polaroid Land Camera Back for SX-70 or 600 Film. This is a mechanism that allows you to load a cartridge of instant film and then push a button to eject the exposed image.
Skink Pinhole Pro Set for Panasonic GF1
.34mm Zone Plate
.22mm Zone Sieve
5mm Black Foam Core Sheet
105mm x 105mm Top with 24mm circle cutout for Skink pinhole adapter
105mm x 105mm Bottom with 80mm x 85mm cutout for film plane
100mm x 50mm Sides
Camera Angle of View: 85° ( Approximate equivalent to field of view of a 24mm lens on a full frame 35mm format system)
Focal Length: 60mm
Aperture: f/300 (.2mm Pinhole)
f/272 (.22mm Zone Sieve)
f/176 (.34 Zone Plate)
Images of completed camera - http://www.pbase.com/slowboat/polaroid_pinhole