1.Copy Cokin filter,Simple, convenient 2.Blend harmoniously into the image. 3.High ... . Screw the ring adapter onto your lens.2. Slide the filter holder on the ring adapter until it snap in place.3 ... . Slide the filter into one of the filter holder slots which is depended by your filter's size.Color: Red, Blue ... Yellow,Graduated Coffee,Graduated Grey,ND2,ND4,ND8Size: 83X100mm square filter