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
photoflood lamps (3400°K) These filters can be used together.
HMC (HOYA MULTI COATED)
These popular filters are renowned for their ability to minimise
reflection at the filter surfaces which reduces flare and ghosting. The
result is an average light transmission of over 97%, giving sharp
contrast and well balanced color. HOYA HMC filters are recommended for
enhancing the performance of today's multicoated lenses.
Sample Photo (With Filter) Sample Photo (Without Filter)
