Photo365 – 20 Mar 2011

Physiogram

Today, I decided that I’d have a go at creating a physiogram, which is simply using a long exposure to record the trace of a swinging light source.  Depending on how the light source is swung, the resulting image looke like something created using the Spirograph toy of the 1980s.

This is a composite of two images, both 20 seconds long at f/22.

The first was a mini maglite fitted with an LED upgrade and the second was a 7 LED rear bike lamp.  The images were then combined in the Gimp.