Hikvision camera lens, TV0550D-MPIR, Auto Iris, Vari-focal 3M Megapixels IR Lens, CCTV Camera Lens, Standard Lens Features: 5-50 mm focus CS Interface Lens iris aperture F1.6-C Sensor 6.5mm(3/4″) 102g Recommended distance within 150 meters Specifications: TV0550D-MPIR Lens Parameters Focal Length:  5-50mm Aperture Range:  F1.7-C Lens Mount:  CS Format:  Φ6.5mm（1/2.7″） Horizontal Angle of View:  1/3″ :49.6°~5.5°1/4″ :40.0°~4.5° Min.Working Distance:  0.3m Iris Control:  DC Weight:  102g Dimension:  Φ43*76.7mm