Bahtinov Mask 83mm Cokin P Fit

A Bahtinov Mask is a focusing aid. When fitted over a lens, it creates a 6 pronged diffraction pattern. As you adjust the focus, the middle spikes will move. When exactly in the middle, perfect focus has been achieved.

This Mask is made to fit the 83mm x 83mm format used by the popular Cokin P filter system (and its clones) for camera lenses. Rather than having a specific screw in mask for each lens, you can use the Cokin system with adapters to fit a variety of lens filter threads. The Mask is laser cut with a fine mask and so will work well with lenses of short focal length and above.