MANUAL ADJUSTMENT: C mount film lens is simple to use and the aperture can be manually adjusted according to the available light level. ADVANCED OPTICS: C mount camera lens uses advanced optics to ensure all around clarity and efficient light guidance. WIDEST FIELD OF VIEW IMAGE: C mount CCTV lens has low distortion and provides you with the widest field of view image that a C interface lens can offer. RUGGED AND DURABLE: F1.4 CCTV lens features an aluminum housing and glass lens. It is rugged and resistant to damage and has a long service life. RANGE OF APPLICATIONS: 25mm F1.4 CCTV lens is suitable for use in bars, stores, parking lots, homes, and warehouses. Item Type: 25mm F1.4 CCTV Lens Material: Aluminum, Glass Original Focal Length: 25mm / 1in Mounting Type: C Mount Aperture: F 1.4 Aperture Operation: Manual Focusing Operation: Manual Viewing Angle: 19.6 degrees Object Distance (OD): Approx. 30cm / 11.8in Package List: 1 x 25mm F1.4 CCTV Lens