2/3" 16mm F/1.4 w/LockIris: ManualMount: C1/3" Angle of View (wide/telephoto) 17.1° x 12.9° 1/2" Angle of View (wide/telephoto) 22.7° x 17.1° 2/3" Angle of View (wide/telephoto) 30.9°x 23.4 ° Effective Diameter (Front/Rear Lens) Ø17.5mm/Ø13.0mm Minimum Object Distance 0.15m Back Focus 11.54mm (in air) Filter Size M30.5 P=0.5 Maximum Diameter ø34mm Overall Length 38mm Weight 80g