Instantly transform your normal Celestron 8” Schmidt-Cassegrain telescopes (8" SCT) and Celestron 8" EdgeHD telescopes into a yellow-light solar telescope. ISO compliant solar safe film protects your eyes when viewing the sun, unlike some other filters on the market Solar film produced in the USA by American Paper Optics, one of the suppliers recommended by NASA for safe solar viewing Designed from the telescope’s lens cap for a snug fit, each filter includes two safety Velcro straps and four self-adhesive Velcro pads for safely securing your solar filter in place