Sirix Digital UV Filter is an all-weather and multi-purpose lens protector made for use with DSLR cameras. This filters main purpose is to absorb ultraviolet rays that often make outdoor photography indistinct and hazy. Its lens construction is composed of optical glass to promote clear imaging and also features an aluminum mount. Sirix Digital UV Filters are available in sizes 37mm, 40.5mm, 43mm, 46mm, 49mm, 52mm, 55mm, 58mm, 62mm, 67mm, 72mm, 77mm, 82mm, and 86mm. Product Features in Detail A multi-purpose fine-weather filter This filter absorbs the ultraviolet rays that makes outdoor photographs hazy and indistinct. As a multi-purpose, fine-weather filter, it does not affect the color as well as black and white films. It also serves as a permanent lens protector. Available sizes 37mm, 40.5mm, 43mm, 46mm, 49mm, 52mm, 55mm, 58mm, 62mm, 67mm, 72mm, 77mm, 82mm, and 86mm