Product weight - 805g / Filter diameter (mm) - 82 / Max. diameter x length (mm) - 88.5 x 113 / AF actuator - Ring USM / Lens construction (elements/groups) - 18/13 / Minimum aperture - 22 / Angle of view (horzntl, vertl, diagnl) - 74� - 29�. 53� - 19�30', 84� - 34� / Maximum magnification (x) - 0.21(at 70mm) / Magnification Extension Tube EF12 II - 0.63-0.18 / Magnification Extension Tube EF25 II - 0.74-0.41 5 / No. of diaphragm blades - 9 / Closest focussing distance (m) - 0.38(Macro) / Distance Information - Provided