This high-performance lens was designed with portability and handling ease in mind. One Super UD-glass element, whose characteristics are similar to fluorite, and one UD-glass element result in sharp pictures from corner-to-corner. The lens also has a built-in hood and a detachable tripod mount.
Focal Length & Maximum Aperture: 400mm 1:5.6
Lens Construction: 7 elements in 6 groups
Diagonal Angle of View: 6 degrees 10'
Focus Adjustment: Inner focusing system with USM
Closest Focusing Distance: 3.5m / 11.5 ft.
Filter Size: 77mm
Max. Diameter x Length, Weight: 3.5" x 10.1", 2.8 lbs. / 90.0 x 256.5mm, 1250g