The beer can is round and somewhat easy to reseal. The round part is important, as the photo paper will be wrapped around the interior[1] for a wide field of vi

The beer can is round and somewhat easy to reseal. The round part is important, as the photo paper will be wrapped around the interior[1] for a wide field of view without a lot of distortion. [1] https://www.instructables.com/Solargraphy/ https://www.instructables.com/Solargraphy/