Description: This 2/3" C-Mount lens is a high end CCTV lens very much used in highly demanding environment of macro photography and industrial/cine work. This lens originally had video signal iris and iris filter, but they have been removed. It has manual focus, which extends beyond the normal focus range found in C mount lenses. It will produce vignetting in 4/3" detectors. Last picture shows it working on a 2200x3000 pixel (3,5um cell size) 10,51x7,74mm CMOS chip (specifically, Cypress IBIS4-6600), so you are guaranteed 2/3" compatibility with no vignetting and even beyond.