One of the best and least expensive solutions for observing the sun with a telescope is to use the Baader Astrosolar Safety Film. There are many places that will sell you a pre-mounted filter for your telescope, or you can make it yourself and save money. For example, by gluing strips of cardboard around the […]
The easy solar filter: Baader Astrosolar Film on aperture mask cover.
March 15, 2015 // by ecuador