Cokin BPW-400A Wide-Angle Filter Holder is compatible with all Cokin P Series Filters. It features an extra slim design that helps to eliminate vignetting on lenses down to a 20mm focal length.
The Cokin BPW400A Filter Holder holds 1 filter and allows the use of filters with ultra-wide lenses (focal lengths under 20mm) 35mm format.
*Note: Adapter ring is not included.