The 400mm f/4.0 DO IS USM is Canon's breakthrough in multi-layer diffractive optical lens technology. This sheds new ground for sports, nature and wildlife photographers, giving exemplary results in a size previously unheard of for a lens of such a focal length and aperture. Simply put, the size and ease of handling must be seen to be understood.
Features
- Flourite & UD elements eliminate secondary spectrum chromatic aberration
- High-diffraction optics provide class-leading low size and weight
- AF Stop function shuts off autofocus when an obstruction appears
- Dust & moisture resistance made exceptional by magnesium alloy lens barrel and new rear gasket at lens mount
- Two-stage image stabilization; dual-axis camera shake correction or vertical axis only(for panning)
- 3-stage focus limiter
- Focus preset function allows for returning to a specifically set focus by turning a ring in front of the focus ring
- Full-time manual focus override
Specifications
| Construction | 13 groups / 17 elements |
| Angle of view | 6° 10' |
| F stop range | 4-32 |
| Closest Focusing Distance | 3.5m / 11.5 ft. |
| Maximum Magnification | 1:8.3 |
| Filter Size | 52mm Drop-In |
| Dimensions (Length x Diameter) | 5.0" x 9.2" / 128.0 x 232.7mm |
| Weight | 4.3 lbs. / 1,940g |
Includes
- Canon Telephoto EF 400mm f/4.0 DO (Diffractive Optics) IS Image Stabilizer USM Autofocus Lens
- E-145 Lens Cap
- Lens Dust Cap E (Rear)
- ET-120 Lens Hood
- Carrying Case 400B
- 52mm Drop-in Gelatin Filter Holder
- Wide Strap
