Cokin BP400A77 P Series 77mm Filter Holder with 77mm Adapter Ring
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.  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.  The Cokin P Filter-Holder is the ideal Cokin Filter-Holder to avoid vignetting on APS and full frame lenses for digital cameras. Up to three filters can be used to create a unique effect. A 77mm lens adapter ring included.