Designed & Crafted in California, USA. PLEASE NOTE: THIS FILTER IS FOR USE ON 50MM OR TIGHTER FOCAL LENGTH LENSES WITH APERTURE SPEED IN THE f0.95 TO f2.8 RANGE. IT WILL NOT WORK ON WIDER LENSES EVEN IF A CROP FACTOR IS INVOLVED - IT WILL NOT WORK ON 35MM LENSES ON CROP SENSORS, ONLY 50MM OR TIGHTER OPTICS. | Easy to use. Subtle yet effective. Professional build. An affordable way to achieve Anamorphic Lens looks without using complicated and expensive Anamorphic Lenses. For Filmmakers and Photographers. | Anamorphic Bokeh, Flares, and Streaks all in one rotating frame. Stackable for use with ND filters or other accessories | Must use with 50mm, 85mm, 100mm, 135mm lenses. Must use with aperture speeds in the f0.95 to f2.8 range | Not for use with larger sized zoom lenses