2/3" 25mm F/1.4 w/LockIris: ManualMount: C1/3" Angle of View (wide/telephoto) 11.0° x 8.2 ° 1/2" Angle of View (wide/telephoto) 14.6° x 11.0° 2/3" Angle of View (wide/telephoto) 20.0°x 15.1 ° Effective Diameter (Front/Rear Lens) Ø23.5mm/Ø16.5mm Minimum Object Distance 0.15m Back Focus 17.17mm (in air) Filter Size M30.5 P=0.5 Maximum Diameter ø34mm Overall Length 52.2mm Weight 103g