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Specification for the EF 100mm f/2.8 Macro Marketed April 1990 Lens Construction (group) 9 Lens Construction (element) 10 No. of Diaphragm Blades 8 Minimum Aperture 32 Closest Focusing Distance (m) 0.31 Maximum Magnification ( x ) 1.0 Filter Diameter ( mm ) 52 Maximum Diameter x Length ( mm ) 75 x 105. 5 Weight (g) 650
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