Pinhole Photography

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Creating photos without a lens

Pinhole cameras and solargraphs use a tiny hole and photo paper to take long exposure pictures. The former can be exposed for a long (seconds-minues depending on brightness) time which can be developed and processed later. The solargraph image is burned into the film over a very long time (days) and requires no development chemicals but will fade with additional light exposure. Once exposed and developed, scanning the negative makes it easy to to invert the negative and correct for some minor exposure issues.

The use of the pinhole camera has lasted over millennia, from sightings back as far as 500 B.C. Another useful pinhole apparatus is a woven straw hat, which during a Solar Eclipse, will make hundreds of crescent Sols in its shadow.


The Devices

cigar box materials

  • cigar box
  • black foam board
  • black tape
  • 4x5" large format film holder
  • photo paper (ilford ~ISO 6)
  • thin metal for pinhole
  • tripod thread adapter screw
  • drill or saw to gently cut the wood
  • lots of time for exposures

film holder materials

  • plastic film holder
  • metal for pinhole
  • black tape
  • photo paper

cigar box specs

  • ƒ = 76.2mm
  • ɸ = 0.371mm
  • ƒ/stop = 1:205
  • Diagonal Viewing Angle = 93.8°
pinhole-acidcigars

Cigar box pinhole camera

pinhole-internals

Inside view



The Photos

broken-obelisk-pinhole
broken-obelisk-pinhole
bridge-pinhole-scan
I had noticed the masonry for the bridges on this road months back, but had never taken the time to go out and get a picture of any. By the time I had taken the picture and climbed back to the road level, I forgot to take a picture with the digi, for a comparison. If you look closely, you can see a pair of deer rib cages.
tgc-courthouse
Tom Green County Courthouse.
park-bridge-trees
A set of Trees about a Bridge in a Park.
cactus-1
The Cactus Hotel.
cactus-2
cactus-2
cactus-3
I was really trying to get the spiky awning partially seen to the right of the picture.
spring15_solargraph

spring15_solargraph

hermann-kite-festival

hermann-kite-festival

bayou_bridge_rabbit

bayou_bridge_rabbit

solargraph-sommer15

solargraph-sommer15


Pinhole Resources

http://users.rcn.com/stewoody/darkcam.htm
http://www.mrpinhole.com/calcpinh.php
http://www.cs.unc.edu/~dorianm/academics/comp235/pinhole/index.html
http://ca.geocities.com/penate@rogers.com/pinsize.htm
http://en.wikipedia.org/wiki/Pinhole_camera
http://www.pinholeday.org/
Battlefield Pinhole Camera