Unmounted AstroSolar Safety Film for solar visual observing. Make your own solar filters for larger scope sizes or multiple smaller scopes AstroSolar® Safety Film 5.0 for solar observation and photography at high magnification Size: ca. 20 x 29 cm – telescope quality – Optical Density (OD) = 5.0 Safe for visual solar observation (with additional optics) and imaging This highest precision film consistently produces strehl ratios of 94 to 96 percent at interferometric tests – thus it performs optically like a Fluorite Triplet Lens by Carl Zeiss or Astro Physics AstroSolar Safety Film is best suited for precision work with all astronomical telescopes and binoculars – just as well as for all photographic camera- and tele-lenses For more than 25 years on the market, the only film-material made to not deteriorate the optical wavefront, it does allow to attain high magnification with any long-range optics without reducing sharpness or contrast of the solar surface. Please see the AstroSolar FAQ Page for more information Instructions from Baader on using the film to easily make your own solar filters
