Hoya 82A Cooling Filter for Color Temperature Control Available-sizes-mm:62mm - $32.90 The FL-WARM (FL-W) is used

The FL-WARM (FL-W) is used to correct the greenish tone that appears when daylight balanced film is used under warm white or white type fluorescent lamps

The effect is similar to the classic Softar portrait filters

The results are both soft-focus and cross effects

The 81B color correction filter warms the ambient light entering the lens by 300° Kelvin by adding orange to the overall exposure

the change of effect can be seen by looking through the filter or through the viewfinder if it is mounted on a camera

Hoya 82A Cooling Filter for Color Temperature Control Available-sizes-mm:62mm - $32.90 The FL-WARM (FL-W) is usedDescription The 82A color correction filter cools the ambient light entering the lens by 200 kelvin by adding blue to the overall exposure. This filter helps ultra fine tune the color or look of your scene to match your film's white balance. The Hoya 82A filter is helpful when: You are using tungsten balanced film and the light source is warmer than the traditional 3200 K and you need a specific amount of color correction to match your film type.