Terry Richardson, Senior Instructor of Astronomy & Physics at the College of Charleston designed a "Make Your Own Safe Solar Viewer" for the upcoming solar eclipse and beyond. We include a copy of his detailed instructions and the set of 2 lenses you need (a DCX lens with a focal length of 500mm and a barlow lens with a focal length of -27mm). Here are the college's links for instructions and additional information: http://richardsont.people.cofc.edu/safe_solar_folder/index.html
