Technical Specifications
Focal Length & Maximum Aperture 400mm 1:2.8
Lens Construction 16 elements in 12 groups (Including drop-in rear filter, Fluorite: G2 and G4, UD Lens: None) Diagonal Angle of View 6° 10'
Focus Adjustment Inner focusing system, with focusing cam
Closest Focusing Distance 2.7m / 8.86 ft. Drive System Ring USM
Filter Size 52mm Drop-in
Max. Diameter x Length, Weight 6.4 x 13.5 in, 135.8 oz. / 163.0 x 343.0mm, 3850g
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