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 different size lenses, 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.

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Rating: - fun filter
It's a novelty when used here and there. It is fun for some shots. My 20 month old daughter giggles everytime she sees her picture with the rainbow. (beyond that, yeah, they're useless)

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Rating: - Save your money
Most useless filter made by Cokin

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Rating: - Cokin P195 Rainbow 1
With this filters you can create a rainbow whenever and wherever you like. You can use this filter in any weather, from a blue sky in the desert to a snowscape. For maximum effect, choose a simple scene with very little detail. Back lighting also yields excellent results.

Helpful hints : The Cokin Rainbows should not be used in combination with other heavily coloured Filters. They are designed for use only with wide-angle lenses. The rainbow effect is subdued at larger apertures, and disappears at apertures above f8. The ideal aperture depends on your lens: 21 mm: f/8 24 mm: f/11 35 mm: f/16

All values are approximate