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The Hitech 6 x 6" #25 Red Filter is a basic contrast filter, primarily for use with black and white film. This red filter dramatically darkens skies, cuts through haze, and increases overall contrast. When compared to the orange #21 filter, the #25 produces very dark, almost black skies and a surreal contrast between foliage, clouds, and sky.
There is an 8x filter factor with this filter, requiring an increase of 3 stops for normal exposure. This filter measures 6 x 6" / 152.4 x 152.4mm and is constructed from specially dyed CR-39 resin.
Red contrast filter for black and white film dramatically darkens skies, cuts through haze, and gives greater contrast overall.
Provides surreal contrast and results in very dark, almost black skies.
Table of Contents
6 x 6" / 152.4 x 152.4 mm
8 (3 stops)
Dramatically darkens skies, increase in overall contrast
Landscapes and general black and white photography