Check the listing for details. Bahtinov Mask Filter for Canon EF 135mm f/2 lens - 83mm ID. Condition: New. Listed at 11.95 USD. This is a completely rewritten version of the Bahtinov mask (originally by Ryoko / brentb) which is modified for the Canon EF 135mm F/2 lens. This Mask features a pretty narrow pattern (0.8mm) for a large diffraction pattern. The inside diameter of this filter is 83mm See the three focus screenshots for the working principle: Left: intrafocal, Middle: focal, Right: extrafocal 3D Printed from a smooth, high finish composite Available in matte black Created with Eselt - Templates for eBay Sellers Payment Shipping All orders ship the same or next business day Monday-Friday Returns Free 30 Day Hassle-Free returns, we want you to be 100% satisfied! Created with Eselt - Templates for eBay Sellers Links Our Store Seller Profile Feedback About us Contact More items Are you looking for something similar? See our other items! Show more items Contact Give us a call Send us a message