Hoya 49mm 80A HMC Filter

These are color conversion filters for the use of daylight type color films with artificial light source. 80A increases the color temperature from 3200øK to 5500øK for the use with 3200øK lamps. To provide photographers with a higher quality professionals require, Hoya created the Multi-coated line of filters. These filters have a 3 layer coating system that further reduces light reflections off the surfaces of the glass, the average is only 1-2%. This means that 98-99% of the light striking the filter is going through it, and depending on the type of filter, into the camera lens and onto the film. These layers of anti-reflective coating are bonded to the surface of the glass in a furnace at a temperature of up to 800 degrees F.