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.