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Specifications for the EF 180 f/3.5L Macro USM Marketed April 1996 Lens Construction (group) 12 Lens Construction (element) 14 No. of Diaphragm Blades 8 Minimum Aperture 32 Closest Focusing Distance (m) 0.48 Maximum Magnifcation (x) 1.0 Filter Diameter ( mm ) 72 Maximum Diameter x Length ( mm ) 82.5 x 186.6 Weight (g) 1,090
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