Product weight - 290g / Filter diameter (mm) - 58 / Max. diameter x length (mm) - 73.8 x 50.5 / AF actuator - Micro USM / Lens construction (elements/groups) / Minimum aperture - 22 / Angle of view (horzntl, vertl, diagnl) - 40�, 27�, 46� / Maximum magnification (x) - 0.15 / Magnification - Extension Tube EF12 II - 0.39 - 0.24 / Magnification - Extension Tube - EF25 II 0.68 - 0.53 / No. of diaphragm blades - 8 / Closest focusing distance (m) - 0.45