The ML410 C-Mount 4-10mm Varifocal Lens from Theia is an IR-corrected lens designed for use with up to 12.4MP resolution cameras equipped with a 1/1.7, 1/1.8, 1/2, 1/2.3, or 1/2.5″ sensor. This varifocal lens features a 4-10mm focal length that delivers a diagonal field of view up to 149 to 55°. It has a manual iris operation with manual focus and zoom with lock screws.