Camera Obscura 2005/1-Inf is a worldwide project in which two holes of a twin-holed pinhole camera are being auctioned simultaneously on Ebay every week. This project is dedicated to the polish artist Roman Opalka and his work 1965/1-∞. The highest bidders in each case receive one after the other a pinhole camera loaded with a piece of unexposed sheet of 5x7 Inch b/w film. They punch a hole with the enclosed needle and expose their own photograph in turn. Because of the minimal distance between the two holes the two photos overlap partly, so that a joint picture emerges, created by two people in different parts of the world. In the course of time a sort of photographic global puzzle will emerge - one continuous series of parallel exposures. At a later date the cameras will be displayed together with the parallel exposures in a permanent exhibition in the Galerie Merid in Stuttgart. They will also be published on this Internet site.
 

The camera
Light-proof cardboard, painted black on the inside with affixed black/white film. On the front there are two marks where the holes should be made and a serial number of the holes. The needles for punching the holes are provided with the camera.
 

Technical data
Twin-hole Camera Obscura made from paper, tape and aluminium
Size 147x202x37 mm
Distance between the holes 73 mm
Film format 5x7 inch
focal length approx. 35 mm
(equivalent 35mm camera approx. 15 mm)
Angle approx. 115°
Hole diameter approx. 0,35 mm
Weight approx. 100 gramm
 

Instructions
Punch a hole carefully with the needle provided and cover the hole immediately with your finger.

Set up the camera for exposure and then remove your finger from the hole.

E x p o s u r e

End the exposure by covering the hole again. Stick the black tape over the hole.


Exposure times
Sun                15 seconds to 30 seconds
Sunny/cloudy/light 30 seconds to one minute       Cloudy             two minutes to 10 minutes      Indoors            one hour to several hours