An original Duclos Lenses design, the PL Extension Tube Set allows you to decrease the minimum focus of your PL mount lens to achieve results similar to unique macro lenses. Decrease the minimum focus distance to within a few inches of the front element while maintaining optimal image quality. The Set features all three lengths, 15mm, 20mm, and 35mm, stack-able up to 70mm of extension for the most dramatic close-up effect with even the longest focal length lenses. Designed and manufactured in the USA by Duclos Lenses, the stainless steel components, precision tolerances, and optically flat internal surface finish are meticulously married to reduce stray light and ensure the highest quality is maintained. Works with S35 and 35FF format lenses and cameras. The PL Extension tubes do NOT work with anamorphic lenses.