Canon EF 400mm f/4 DO IS II USM

Lens Reviews / Canon Lenses i Lab tested
Lens Specifications
Name Canon EF 400mm ƒ/4 DO IS II USM
Image Circle 35mm
Type Telephoto Prime
Focal Length 400mm
APS Equivalent 640mm
Max Aperture ƒ/4
Min Aperture ƒ/32
Diaphragm Blades 9 (rounded)
Lens Construction 18 elements in 12 groups, including 1 aspheric and 1 UD element; Newly-developed gapless dual-layer diffractive optical (DO) elements; Fluorine coating on front and rear lens
Diagonal Angle of View(Based on image circle) 6.2 degrees
Focus Details Inner focusing; full-time manual focus and ring USM
Front Element Rotation No
Zoom System n/a
Closest Focus 3.3m / 10.8 ft.
Magnification Ratio 0.13x / 1:7.7
Filter Size 52mm Drop-in
Dimensions(Length x Diameter) 233mm x 128mm / 9.2 in. x 5 in.
Weight 2.10kg / 4.6 lb
Notes Image Stabilization (4 stops); Weather-sealed construction
Typical Online Price US$6,900 (Avail. Nov 2014)