Beer Can Pinhole Camera Takes Longest Exposure Photograph Ever

This pinhole solargraph, taken using a beer can pinhole camera over a period of eight years and one month, is thought to be the longest exposure image ever made. The photo shows the path of the Sun across the sky over that time period, almost 3000 trails in all. Regina Valkenborgh set the camera up in 2012 and then forgot about it; it was found by someone else this year. Said Valkenborgh of the project:

“It was a stroke of luck that the picture was left untouched, to be saved by David after all these years. I had tried this technique a couple of times at the Observatory before, but the photographs were often ruined by moisture and the photographic paper curled up. I hadn’t intended to capture an exposure for this length of time and to my surprise, it had survived. It could be one of, if not the, longest exposures in existence.”

If you want to make your own solargraph (it doesn’t have to go for 8 years…), check out the instructions here.

• photography
• Regina Valkenborgh
• Sun