Introduction: Tianya camera filters were invented by professional photographer, and are now the world's leading range of special effect filters suitable for SLR, video, medium and large format camera systems. There are over 140 different filters available.How does the Cokin system work ? The Cokin Creative System consists of 3 main components : An Adapter A Ring A Filter Holder 1-3 filter. For samples,Please visit album of photos made with Cokin: https://www.flickr.com/photos/bigsleep/sets/72157594547064548/ Suitable for:This system is suitable for almost all lenses of SLR cameras (35 mm, APS or Digital), Medium and Large format cameras, Video/ Broadcast cameras, Slide Projectors, including most wide angle lenses in all those applications.Tianya producing filters for last 35 years - & their filters are very high quality. Made of Optical Resin CR-39 same quality and material as Cokin, Lee, Singh Ray...Package Contains:1pc Tianya Gradual Tobacco Filter for Cokin P series.