This dark green filter is ideal for scenes where it is important to differentiate green tonal values in black and white photography. This filter is made of glass and measures 100 x 140 mm (4x5.65") x 4 mm thick. Features: - A dark green filter that produces very light foliage on black and white film - Also used for contrast effects (lightens green/darkens red) Specifications: - Type: Green - Size: 4x5.65" (100 x 140 mm) - Grade: 58 - Filter Factor: 6 (+2 2/3 stops) - Effect: Enhances the light green colour of leaves - Application: Particularly suitable for landscape photography; Due to its favourable effect on red tones, it is also suitable for portraits - Construction: Glass