Red 23A Screw-In Filter Size:77mm A 30° grid offers a

A 30° grid offers a little less control

Infrared control filter helps to block infrared pollution from affecting the color fidelity of imagery

They can remove unwanted reflections from non-metallic surfaces such as water or glass and also saturate colors providing better contrast

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This filter attenuates approximately 97% of UV radiation

Red 23A Screw-In Filter Size:77mm A 30° grid offers aIncreasing contrast when working in black and white, this Red 23A Filter from Tiffen is used to noticeably darken cool and blue tones in order to emphasized both shadows and clouds. Offering greater tonal separation than regular yellow and orange contrast filters, the light red 23A is especially well suited to producing dramatic outdoor and landscape imagery. There is an approximate 4x filter factor with this filter, requiring an increase of 2 stops