Sigma Rear Filter Holder FHR-11 for Sigma 14mm F1.8 Art (Canon Only)

The Sigma Rear Filter Holder FHR-11 is an accessory exclusively designed for the Sigma 14mm F1.8 DG HSM Art lens (Canon fit), and it enables photographers to use a filter gel sheet with the lens. By attaching it to the rear of the lens, it will allow more freedom of expression. Please do not attempt to attach it to any other lens or mount.

Price: 34.99 from Wex Photo Video