These filters offer both amateur and professional photographers HOYAs famous quality at reasonable prices. They have multiple coatings applied to both surfaces to suppress reflection and increase light transmission.The Hoya Pro1 Digital UV Filter is a multi-purpose, fine-weather filter that is designed to optimise the photography experience of digital SLR users. UV filters absorb ultraviolet rays that often make outdoor photographs hazy and indistinct, and can be constantly fitted to a lens to provide improved clarity and colour balance, as well as to provide protection to your lens. Hoya Pro1 Digital filters are optimized for use with digital SLR cameras, but they are also perfect for traditional 35mm SLR applications, including black and white photographyHOYA Pro1 Digital filters are renowned for their ability to minimise reflection at the filter surfaces which reduces flare and ghosting. The result is an average light transmission of over 97%, giving sharp contrast and well balanced colour. HOYA Pro1 Digital filters are recommended for enhancing the performance of todays multicoated lenses. The Black Almite Frame (BAF) is a black matte finish aluminum frame that reduces reflections to enhance contrast. In addition, the Black Rimmed Glass (BRG) reduces light reflection around the filter edge. Low Profile Frame (LPF) is an Ultra thin frame which helps avoid vignetting on wide-angle lenses, and the Knurled Edge Frame (KEF) aids easy attachment and removal.