Product weight - 200g / Filter diameter (mm) - 58 / Max. diameter x length (mm) - 68.5 x 70 / AF actuator - Micro Motor / Lens construction (elements/groups) - 11/9 / Minimum aperture - 22-38(36)_ / Angle of view (horzntl, vertl, diagnl) - 64� 30' - 23� 20', 45� 30'- 15� 40', 74� 20' - 27� 50' / Maximum magnification (x) - 0.34 (at 55mm) / Magnification - Extension Tube EF12 II - 0.64-0.23_ / Magnification - Extension Tube EF25 II - 1.00-0.51_ / No. of diaphragm blades - 6