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|Focal Length & Maximum Aperture||20mm 1:2.8|
|Lens Construction||11 elements in 9 groups|
|Diagonal Angle of View||94°|
|Focus Adjustment||Rear focusing system with USM|
|Closest Focusing Distance||0.25m / 0.8 ft.|
|Max. Diameter x Length, Weight||3.1" x 2.8", 14.3 oz. / 77.5 x 70.6mm, 405g|
Ultra-wide-angle lens for serious applications. Easy to hold and carry at 14.3 oz. (405g). Floating rear focusing system. Sharp images are obtained at all subject distances.