Marshall Electronics V-553. 9-5MP-VIS-IR 1/2 Lens CS-Mount; CS-Mount fixed focal length lens; fits cameras: CV344 (and previous model CV343) / CV346 (and previous model CV345) / CV365-CGB / CV380-CS / CV420-CS; Megapixel Rating: 5 MP; Focal Length: 3.9 mm; Horizontal AoV: 80° (1/3"") / 96° (1/2.5"") / 125° (1/1.7""); Aperture: F2.0