The Cokin Creative Filter System consists of a rectangular plastic filter holder with four slots (one for Cokin rotating filters and three for rectangular ones), a variety of optional adapter rings which click into place and rotate, and many optical resin filters.
There are two Cokin sizes, "A" & "P". The "A" series is adequate for 35mm cameras and camcorders, and fits filter sizes from 36-62mm. The "P" series covers diameters from 48-82mm and is generally preferred for everything, particularly wide angle lenses. Over 100 filters and a wide range of accessories are available for each system, i.e. modular lens hoods, lens caps, and storage boxes.
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Comments about Cokin "A" Series - Filter Holder, 55mm Adapter Ring and 28 Page Pamphlet:
Cokin has always been an economical answer for Camera filters. I used them on my Olympus OM-1 and now use them on my Sony A33. By buying the correct size adapter rings, the holder will fit many different lenses. It is more economical than buying filters in several sizes. The holder can appear awkward on a small lens, but it has never given me any problems.
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