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The Sun Cannon
The Sun Cannon
Mona


Photograph Information Photographer's Comments
Challenge: Free Study 2026-07 (Standard Editing)
Collection: Portfolio
Location: Åtvidaberg Sweden
Date: Jul 6, 2026
Aperture: 1.8
ISO: 64
Shutter: 1/1305
Date Uploaded: Jul 31, 2026

 The World’s Only Functioning
SUN CANNON
The Sun Cannon is installed in a red brick tower from 1853 and at that time part of the English Garden at Adelsnäs Manor. It is a 6-pound cannon from the same period, with an ignition system consisting of a magnifying glass mounted on a movable arm, adjustable to the sun’s different meridian latitudes. The tower has an opening directly south which are 8 inches wide and 118 inches tall.

At exactly 1 pm, when the sun reaches its highest point at midday in summertime, the sun shines through this opening, hitting the magnifying glass focused on the priming compound at the back of the cannon. The primer ignites rebounding on the main charge. On cloudy days it is fired using a match. The smoke is thick and the deafening noise can be heard all over Åtvidaberg!

Statistics
Place: 50 out of 52
Avg (all users): 5.0000
Avg (participants): 4.9643
Avg (non-participants): 5.0769
Views since voting: 9
Views during voting: 48
Votes: 41
Comments: 1
Favorites: 0

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AuthorThread
 Comments Made During the Challenge
08/04/2026 03:03:11 AM
Composition: 6 [w:4]
Technical: 3 [w:4]
Creativity: 4 [w:7]
Appeal: 3 [w:10]
Challenge: N/A (Free Study)
Overall Weighted Average Score: 4

Note: *Weighted category voting. Feel free to let me know your thoughts or feedback about the methodology or weighting (not my vote on your image) here. PW: dpc2026


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