8mm F/1.4 w/LockIris: ManualMount: C1/3" Angle of View 33.1° x 25.0° 1/2" Angle of View 43.6° x 33.1° 2/3" Angle of View 59.3° x 45.2° Effective Diameter (Front/Rear Lens) Ø13.7mm/Ø10.4mm Minimum Object Distance 10.2 in. (0.26m) Back Focus 11.60mm (in air) Filter Size M25.5 P=0.5 Maximum Diameter ø1.1 in. (ø29mm) Overall Length 1.1 in. (27mm) Weight 1.4 oz. (40 grams)