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Specifications for the EF20-35mm f/3.5-4.5 USM Marketed March 1993 Lens Construction (group) 11 Lens Construction (element) 12 No. of Diaphragm Blades 5 Minimum Aperture 22-27 Closest Focusing Distance (m) 0.34 Maximum Magnifcation (x) 0.13 Filter Diameter ( mm ) 77 Maximum Diameter x Length ( mm ) 83.5 x 68.9 Weight (g) 340
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