Hoya 49mm 80A Color Conversion Glass Filter

The Hoya 49mm 80A Glass filter is blue. It is used to balance daylight film under artificial, tungsten or standard (household) incandescent lighting.

Let's say you're at a family gathering and you've brought your camera and want to take some photos of this once-a-year gathering. You have traditional daylight balanced film but find yourself in a room filled with table lamps. If left unfiltered, your photos will turn out yellowish. Under certain circumstances, perhaps a nice effect but not flattering in terms of skin tones or what our eyes are used to seeing or expecting. Enter the 80A filter!