The Cokin Multi-Image 7 filter produces one image surrounded by six identical images. The six outer images may be moved around the periphery by rotating the filter holder. Unlike conventional screw-on prism filters which can only reproduce a central image surrounded by multiple images, the Cokin system gives you more control by allowing you to either rotate the filter holder or by shifting the filter itself i.e. the multiple images might take up only half the total image area. This is because Cokin filters are adjustable axially and laterally. It is also recommended that you do not stop the lens aperture down too far. Otherwise, you will see the design of the filter rather than the effect.
This filter measures 66 x 72mm and fits the Cokin A series holder.