Tamron M23FM06 2/3" 6mm F1.8 Manual Iris C-Mount Lens, 6 Megapixel Rated Rated for 6 Megapixel Resolution Camera Wide Angle with Low Distortion Designed for Resolving Images on 2.5 Micron Size Sensors Focus Range: 0.1m to Infinity; Filter Thread: M67 x P0.75 Locking Screws for Focus and Iris