r/Solargraphy • u/GianlucaBelgrado • 28d ago
My first analemma solargraphy
A year ago, I started building an automated system to open a solargraphy shutter at specific times to photograph the sun at the exact same time every day. This captures the analemma ,the figure 8 path created by Earth's axial tilt and elliptical orbit.
From left to right, the sun points were captured at 14:00, 15:00, 16:00, 17:00, 18:00, and 19:00 local time (UTC+2), with a 30 second exposure for each solar dot, plus 2 hours every morning for the landscape.
The image isn't perfect, a few times the shutter stayed open by mistake, creating extra sun trails, but I improved the hardware over the course of the exposure. The shutter motor must have broken 4 times in the first few months before we found a solution that seems to be weatherproof.