Utilizing a spring-folded assembly design to hold it securely in place on an optic or camera, the Daystar Filters 50mm White-Light Universal Lens Solar Filter allows you to safely view or photograph the sun and solar eclipses. Made from 12312-2 ISO-certified SOLARITE film, it stops more than 99.999% of intense light, plus 100% of harmful IR and UV radiation — to reveal sunspots and super granules on the solar surface. It fits on the front your lens, telescope, spotting scope, or other optics and imaging devices, this version of the ULF can accommodate housings, sunshades, and dew shields with an outside diameter from 50-69mm. The filter has a clear aperture of 50mm, so vignetting may occur when used on lenses and optics that approach the maximum recommended diameter in the size range.