Overview: 2.1mm 160° wide angle Standard M12x 0.5 thread Image format for both 1/3" & 1/4" CCD Aperture F2.0 Weight: 7g Dimension: 17 (Diameter)X19.5mm (L) Lens Construction: 6-6 Angle of View: 160° Focal Length: 2.1mm Back Focal Length: 5.44mm Format: 1/3", 1/4" Aperture: F2.0 Specifications: Dimensions: 0.67 in x 0.67 in x 0.75 in Weight: 0.28