Thank you for viewing. This is a Zeta Wideband C-PL 55mm filter for sale. Comes with a dedicated case. I haven't used it much because I replaced the lens after purchasing it. It's in near-new condition, but please understand that it is a used item that has been opened. Brand: Kenko Tokina Zeta (Television) Filter Function: C-PL (Circular Polarizing) Filter Filter Shape: Circular (Slim) Circular Filter Size (mm): 55.0 mm Filter Surface: Full Surface Filter Features: Ink-filled outer edge of the filter