Cokin Series P Incolor 2 (Diffuser) Filter with Center Spot for Wide Angle P060 Duffiser 1 is a mild, duffuser for a gentle effect. (Available as 070 for 21-35mm lenses). P061 Duffuser 2 is stronger than duffuser #1. (Available as 071 for 21-35mm lenses). P060/P070 is also available in an oval design which is ideal for horizontal or group portraits (Filter P 140); suitable for all focal lengths.