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.
Focal Length & Maximum Aperture: 20mm 1:2.8
Lens Construction: 11 elements in 9 groups
Diagonal Angle of View: 94 degrees
Focus Adjustment: Rear focusing system with USM
Closest Focusing Distance: 0.25m / 0.8 ft.
Filter Size: 72mm
Max. Diameter x Length, Weight: 3.1" x 2.8", 14.3 oz. / 77.5 x 70.6mm, 405g