Sigma PUV-21 Water-Resistant Protector & UV Filter (105mm)

Featuring a fully revamped physical design, this 105mm PUV-21 Water-Resistant Protector & UV Filter matches the visual identity and pristine optical quality of Sigma lenses. Fashioned from clear optical glass, the filter absorbs ultraviolet light, reducing the bluish cast of daylight. It protects the front element of your lens against dust, dirt, and scratches, and has a water-resistant optical coating that repels liquids.