Hoya 52mm HMC UV Camera Protection Filter

Filter is in very good cosmetic condition. 

An ultraviolet (UV) filter is a clear-glass photographic filter that is attached to the front of a lens that blocks incoming ultraviolet light rays from reaching the camera sensor.

Though it is not visible to our eyes, UV light may affect our images when shooting in daylight, especially when shooting in mountainous environments or near the sea. It can result in a slight blue color cast in the resulting photos.

A UV filter can block incoming ultraviolet light from reaching the camera sensor, removing the unwanted blue color cast.

Film photography is more sensitive to UV light compared to digital cameras, which means that it can be important to use a UV filter when shooting on a non-digital medium.