These are color conversion filters for the use of daylight type color films with artificial light source.
80B increases the color temperature from 3400°K to 5500°K for the use of photoflood lamps.
Standard
These filters offer both amateur and professional photographers HOYA's famous quality at reasonable prices. They have coatings applied to both surfaces to suppress reflection and increase light transmission. There are a few exceptions in the special effects range which, due to the special materials used in construction, do not have coatings applied.