This is a circular PL filter for Sigma's φ82mm lens. It has been used a few times after purchase. There are some scratches and scuffs on the outer box due to storage, but the filter itself is in good condition. SIGMA DG CIRCULAR PL 82mm Brand: Sigma Filter Function: C-PL (Circular Polarizing) Filter Filter Shape: Circular (Slim) Filter Surface: Full Surface Filter Features: Black ink applied to the outer edge of the filter