This is a circular PL filter for Sigma's φ86mm lenses. I used it a few times with a Sigma 85mm f1.4 DG HSM ART after purchasing it. The outer box has some scratches and scuffs from storage, but the filter itself is in good condition. SIGMA DG CIRCULAR PL 86mm Brand: Sigma Filter Function: C-PL (Circular Polarizing) Filter Filter Shape: Circular Filter Surface: Full Surface Filter Features: Black ink applied to the outer edge of the filter