Subscribe vis RSS
Eclipse Viewer ~ Sunday, August 20, 2017
Tomorrow is a solar eclipse (not complete here, but at least 75%) so we made a sun viewer.
direct link
First we tried the cereal-box/camera-obscura design that you've probably seen recommended in the internet. I thought the image was kinda meh so I built a version made out of mailing tubes, with a pinhole lens at one end and a "screen" (cap) for it to project onto at the other, and cut out a window to view it.
It works but was a little hard to aim, so I added some cards as a guide--if the shadow of one card is on the other, you're holding it right and shold see the sun.