ISCO-Gottingen WESTROGON 1:4 / 24mm. German-Made Top Quality, SUPER WIDE-ANGLE Lens. Easily adaptable to other SLR or DSLR cameras, as well as to Micro 4/3. In NrMint Used Condition! In Fully Working Order! Insides are clean and clear! A few dust specks may be present. Aperture and focusing actions are working correctly! NOT many lenses were made by this company! ISCO stands for: Jos. Optische Werke, Göttingen, West Germany. Please refer to the photos for a better description and condition report. Feel free to message me or call my store with any questions Thanks!