A protector filter is a popular addition to camera equipment as it protects the front element of the lens from scratches, dirt, water, and other foreign objects. Additionally, it can make cleaning the lens easier, as you can simply remove the filter and clean it instead of the lens.

Key features of the Hoya Pro1 Digital UV Filter:
Digital, multi-coated filters significantly reduce the occurrence of stray light and ghost images caused by reflections.
Black Almit frame: The filters feature a frame made of black, matte aluminum with a satin Almit finish that reduces reflections.
Low-profile frame: Ultra-thin filter frames designed to prevent vignetting with ultra-wide-angle lenses are also constructed to hold a lens cap.
Knurled edge frame: These filters are equipped with a straight knurled edge for a non-slip, easy attachment and removal.
UV-protected housing: The filter housings are UV-protected to further extend the lifespan of the filters.