Ultra-Long Exposure Photos and Digital Solargraphy
Channel: volzo
Date: 2021-07-30

More info: https://volzo.de/posts/digital-solargraphy/
Source code, CAD files, and everything else: https://github.com/volzotan/compressorcam

Do you want to take long exposure images for days, weeks or even months? 
Solargraphies (pinhole images on photograhic paper that capture months of the sun arching across the horizon) were a thing starting sometime in the 200Xs and this got a lot of people excited for film again. Quite a few people apparently started dropping cans with paper and pinholes in woods and the public urban space and I very much like this idea.

But how can we move the art of solargraphy into the digital domain?

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Timeline:

00:00 Introduction
01:20 Theory
02:57 The Problem
05:38 Dynamic Range
08:50 Hardware
10:30 Assembly
11:30 Results
12:44 A few remarks
13:45 Outro

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Blog: https://volzo.de
Twitter: https://twitter.com/vlztn

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Music by Peyruis: https://www.youtube.com/c/Peyruismusic
Swing [CC BY]: https://soundcloud.com/peyruis/swing
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Analog solargraphy images by Willi Winzig [CC BY]: https://www.flickr.com/photos/92417107@N04/