Hoya 67mm 81A Filter Overview
The 81A, 81B, and 81C are light balancing filters used to decrease the color temperature slightly for a warmer (redder) tone. They correct the tendency toward bluish tones. For example, the 81A should be selected when using tungsten Type B color film (3200°K) with photoflood lamps (3400°K) These filters can be used together.
The 81A, 81B, and 81C are light balancing filters used to decrease the color temperature slightly for a warmer (redder) tone. They correct the tendency toward bluish tones. For example, the 81A should be selected when using tungsten Type B color film (3200°K) with photoflood lamps (3400°K) These filters can be used together.
