The Corning Varoptic C-C-39N0-160 is an electronically focus controllable C-Mount objective, based on the A-39N0 variable focus lens. It incorporates all necessary electronic components to drive the lens, and just needs a DC power supply; focus can be controlled though either an RS232, I²C, Analog or SPI input. With a 16mm EFL, and compatible with 2/3" sensors, it is specifically designed for machine vision applications.