Corona_Pinhole

thingiverse

I decided to create a pinhole design after printing Mathgrrl's Total Eclipse pendant from Thingiverse (www.thingiverse.com/thing:2481857). To make it more interesting, I thought of designing a blank insert with a pinhole. However, that idea was pretty dull. Videos show people using colanders and I wondered if the shape of the pinhole really mattered. Technically, there's a top and bottom to the design, with the edge slightly tilted inward. In reality, though, it can be hard to tell from a physical print. Depending on which side is facing you, the outer row is concave, the inner row is convex, and the center is cylindrical - we should get at least one good pinhole shadow. Alternatively, the opposite could be true, but honestly, there's no wrong way to do it! No guarantees of effectiveness, but I'm excited to find out together on August 21st. Update: It worked amazingly well! When I first tried it, I thought the holes were too big and nothing was working. However, I had initially tested it when the partial eclipse had just started, so the crescent shape wasn't as prominent yet. I tried it again about a half hour before totality and it was fantastic. I took these pictures at that time. Note: The picture of the sun was taken with my iPhone, with the eclipse glass "lens" placed over the camera's actual lens. There is no significant difference between convex and concave holes, at least from this distance. More holes are definitely better!