Zoom Lenses Spherical Cooke Cooke Cooke S4/i 15-40mm T2 CXX ZoomT-Stop: T2 – T22Close Focus: 169mm / 6.94 inLength (front to PL mount flange): 229mm / 9 inchesFront Diameter: 136mmWeight: 3.6 Kg / 7.9 lbs