For the upcoming solar eclipse in march 2015 I build this screen to be able to watch the sun in a g group of people. NEVER LOOK DIRECTLY INTO THE SUN WITH OR WITHOUT OPTICAL INSTRUMENTS! Also be aware that even when such a screen us used the heat of the sun can cause damage to your telescope, so please use any measures to not let too much light into your telescope (usually a lens cap with a smaler opening) Supervise your audience especially small childs!Use the Blend file to customize for your telescope. I added a slightly larger mounting (33mm diameter) for easy fit on some eye pieces. Parts you need: Assembly: cut out screen material, you may use thicker paper, I used a PVC foil, one side is matte which is good. Of course a opaque material is better but this semi transparent makes it possible to look at the image from behind. tap the two M3 threads for the carbon tube
Telescope Sun Screen for Projecting Images of the Sun