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