This Cokin Round Nuances UV Protector filter has a diameter of 72mm. A UV filter is the most widely used filter in photography. It filters UV rays, which improves the quality of your photos. A UV filter also protects against dust and scratches on the lens surface.
Cokin UV series
Cokin UV filters from the Nuances series are made of high quality Schott Glass B270 tempered mineral glass. Due to a newly developed coating technique, Nuance filters have a very high density. The glass gives almost no light loss and protects very well against reflection.