PRODUCT HIGHLIGHTS - Helps absorb ultraviolet light - Reduces the bluish cast of daylight - General protection filter - Repels water, oil and static electricity Introduction to the Sigma AFK9B0 The Sigma 105mm WR UV filter is a versatile clear filter that helps absorb ultraviolet light and reduce the bluish cast of daylight. This filter is particularly useful for photography at high altitude or near bodies of water. It provides no additional colouration or contrast, allowing you to combine it with other filters. A UV filter is also useful as a general protection filter to be left permanently on the lens. This filter helps reduce dust and moisture that could reach the front element of your lens and offers additional protection in the event of drops or situations where scratches could occur. This Sigma WR UV filter is treated to repel water droplets and resist fingerprints. It is also treated to exhibit antistatic properties to prevent microscopic dust from adhering to the front surface. This helps to ensure sharp images. - Absorbs some ultraviolet light and reduces the bluish cast of daylight - Provides no additional colouration or contrast, allowing you to combine this filter with others - General protection filter that reduces dust, dirt, moisture and scratches that could reach the front element of the lens - Made from water-, oil- and static-resistant glass