Hoya 72mm 81B Warming Glass Filter

Product DescriptionHOYA 72MM 81B FILTER These are light balancing filters used to decrease the color temperature slightly for a warmer (redder) tone. Corrects the tendency toward bluish tones. For example, the 81A should be selected when using tungsten Type B color film (3200°K) with photo flood lamps (3400°K) These filters can be used together.

Source: Digital Camera and Video Store...