How big a piece of Baader Solar Filter Material do I need to take a picture of the Sun?
The 1″ piece of Baader filter material on the Baader Solar Viewer card is readily adapted for 35 mm cameras. For use with a telephoto lens, a 1.5″ piece of Baader is recommended. A 2″ piece of Baader is sufficient for commercial television cameras, and produces impressive images that may be aired along with TV coverage of the solar event.