Rollei UV (ultraviolet) Filter is a black and white optical UV filter that aids in the absorption of ultraviolet light and reduces the bluish cast of daylight. The filter has no additional color or contrast, permitting pairing with other filters. UV Protector Filter is ideal for shooting at high altitudes and near bodies of water. UV Filter reduces the amount of dust, moisture, and scratches from damaging your lens. Compatible with lenses with Bayonet VI filter thread.