The Sigma 67 mm protection filter is a versatile clear protection filter designed to remain permanently on the lens. This filter helps reduce dust, dirt, and moisture that could reach the front element of your lens and provides additional protection in the event of drops or situations where scratches could occur. - Adds no additional colouration or contrast, allowing you to pair this filter with others - The general protection filter reduces dust, dirt, moisture, and scratches that could reach the front element of the lens