Tiffen 77mm 81B Lens Filter

Tiffen 77mm 81B Lens Filter

Warming filters reduce excess blue tones that effect daylight film when shooting sky or sea scenes or in high altitude photography. They are also effective if your flash exposures are too 'cool'. 'B'is slightlty warmer than 'A' but has the same filter factor of 1.4, requiring 1/2 f-stop of additional light. All light sources, natural or artifical, have characteristics that affect color rendition on film. Color correcting filters are designed to 'warm', 'cool' and/or correct for the many variat