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The Formatt 4 x 4" Red 25 Filter is ideal for strong contrast improvement since it absorbs green and blue completely and enhances red. In addition to contrast control, red filters enhance skin tones, tonal corrections and are effective for more dramatic landscapes.
Formatt, a company with three generations of professional filter-making experience produces every filter to the highest technical standards. The finest materials, together with state of-the-art production technology have resulted in a standard of optical excellence unmatched anywhere else.
Clouds are dramatically improved almost to the mood of a thunderstorm: darkens blue sky creating dramatic contrast between sky and clouds
It is more effective in cutting through haze, and moonlight effects are easily accomplished: creates greater contrast between foliage and flowers
It is also suited for infrared photography
Absorbing Cell Technology
The secret to Formatt's consistency in filter design lies in its unique "Absorbing Cell Technology" (A.C.T.): This unique process allows color correct dyes to be applied to optically pure, wafer thin absorbing cells and offers a controllability that ensures the smoothest grad lines and consistent color across the whole filter surface
This process is revolutionary compared with conventional filter dying techniques by eliminating the need to directly coat the glass surface itself; the repeatable performance gained through A.C.T. ensures that at any time you have to swap like filters for like filters mid shoot you can do so with confidence with no discernable differences in color or density
Each filter is guaranteed flatness to a maximum 2-wave value and comes with an individual reading from a laser interferometer; every filter is carefully verified with a densitometer and spectrophotometer to ensure consistent and accurate transmission, before leaving the factory - the result is an absolute purity of image that eliminates any unwanted colorcast caused by conventional greenish soda-lime glass
In the Box
Formatt Hitech 4 x 4" Red 25 Filter
Table of Contents
4 x 4" (100 x 100mm, 4mm thick)
3 (+2 stops)
Lightens reds and enhances blues
Create dramatic sky effects, emphasizing cloud contrast for landscapes; simulate a moonlit scene at midday with slight underexposure; use with infrared film to yield extreme contrast with skies, turn foliage white and cut through fog and haze