Solar Filter Sheet 150 x mm for Telescopes, Binoculars & Cameras - DIY Film Sun, Sunspot Eclipse Viewing Absolute Eclipse, OD 4.8, ISO 12312-2 Tested

DIY solar filter for any optics - cut this aluminised solar film to size and fit it over the front of a telescope, binoculars, spotting scope or camera lens, for safe direct viewing and photography of the Sun, sunspots, planetary transits and solar eclipses, at a fraction of the cost of a ready-made filter Optical density OD 4.8 - the film transmits roughly 0.0015 percent of visible light, blocking more than 99.998 percent of sunlight along with harmful ultraviolet and infrared, and shows a sharp natural orange solar disc with crisp sunspot detail Independently tested film - the solar filter material has been tested to EN ISO 12312-2:2015 by ICS Laboratories, an ISO/IEC 17025 accredited laboratory, for light transmittance, uniformity and material quality Three sizes, cut to fit - supplied as a flat square sheet in 100, 150 and 210 mm, measure your instrument aperture and trim the film leaving at least 10 mm of overlap on every side Fit it the right way - the silver reflective side faces the Sun and the black side faces your instrument, the filter must always be the first element in front of the objective and never behind the eyepiece, each Absolute Eclipse pack holds one sheet with printed instructions