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The Hitech 165 x 165mm #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 6.5 x 6.5" / 165 x 165mm and is compatible with the Hitech 165mm filter holder. It is constructed out of CR-39 dyed 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.
6.5 x 6.5" / 165mm x 165mm filter, compatible with Hitech 165mm filter holder.
Table of Contents
6.5 x 6.5" / 165 x 165mm
8 (3 stops)
Dramatically darkens skies, increase in overall contrast
Landscapes and general black and white photography