Focal Length: 2.8 - 12mm. Back Focal Length: 9.75 - 20.46mm. Iris type: Direct drive. Aperture: F 1.4-360 . Format: 1/3in.,1/4in. Angle of view: 1/3in. 134゚-32゚/ 99.8゚-25゚ / 72.5゚-18.7゚ . Angle of view: 1/4in. 92.7゚-23.4゚/ 72.5゚-18.8゚ / 53.5゚-14゚. Dimensi