Editorial Review:Product Description:One of the reasons of the Cokin success story is that Cokin is permanently in close contact with both professional and amateur photographers and videographers, so as to listen to their ideas and precise needs. The products launched by Cokin are therefore always perfectly adapted to real needs.
Amazon.com Product Description:Cokin filters were invented by professional photographer Jean Coquin. By using square filters like Cokin's, which fit into a holder and are attached to a lens via an adapter ring, the photographer has a number of immediate advantages. There is no need to duplicate filters to fit lenses of different sizes, up to three filters can be used at once to create unique effects, and the photographer has control over the positioning of the effect on the photograph.
Customer Reviews
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Rating: 
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Warm
Add warmth to light and a pleasant tan to your photo. In general, they suppress blue casts on overcast days and on subjects lit by blue sky. These filters correspond to the Wratten Series 81 (81 A, B, C) and complement the Cokin blue filters (023, 024, and 025) which create cooler or bluer tones.
Helpful hints : Do not combine these with other color filters as this will destroy the subtle effects. But you can combine them with optical effects filters, including Pastels, Dreams, Star, Speed,etc. END