Compatible with Cokin P series. 
Gradual filter is a MUST HAVE for digital users, because the digital sensor unlike film has very low exposure tolerance. Detail will be lost on both low and high light area. To correct this, you need gradual filter to balance it!

1. 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.
package included:
1x Gradual Filter 
NO Retail Box.

The adapter and filter holder are NOT included. If you need them,please click here:
how to use it