| 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) |
