Product weight - 335g / Filter diameter (mm) - 52 / Max. diameter x length (mm) - 73 x 69.8 / AF actuator - USM / Lens construction (elements/groups) - 12/8 / Minimum aperture - 32 / Angle of view (horzntl, vertl, diagnl) - 20�40', 14�10', 24�30' / Maximum magnification (x) - 1.00 / Magnification - Extension Tube EF12 II - 1.28 - 0.20_ / Magnification - Extension Tube EF25 II - 1.61 - 0.44 / No. of diaphragm blades - 7 / Closest focusing distance (m) - 0.20 / Distance information - Yes / Image stabilizer - No / 35mm film equivalent focal length - Approx. 96