60 Day 100% money back guarantee. This listing is for one Tamron M23FM12 ultra-high-resolution fixed-focal machine vision lens. It is designed for 2/3-inch format cameras and uses a standard C-mount interface. The 12mm focal length, F/1.8 to F/22 manual iris, manual focus, and independent locking screws make it well suited to factory automation, dimensional inspection, robotics, microscopy, and other industrial imaging systems. Tamron designed this 6MP series for sensors with pixel pitches down to 2.5 µm, with low distortion and a 0.1 m minimum focusing distance. The front filter thread is M49 x 0.75. Cosmetic condition is like new, with only minor storage or handling marks visible. The lens is offered untested. One lens and one front cap are included per purchase. Photos show the eight available units; the supplied unit will be comparable in condition. Keyword Block: tamron m23fm12, 12mm c-mount, 2/3-inch format, 6mp machine vision, industrial optics, manual iris, fixed focal, factory automation, visual inspection