| Angle of view (horzntl, vertl, diagnl) | 5°10', 3°30, 6°10' | | Lens construction (elements/groups) | 17/13 | | No. of diaphragm blades | 8 | | Minimum aperture | 32 | | Closest focusing distance (m) | 3.5 | | Maximum magnification (x) | 0.12 | | AF actuator | USM¹ | | Filter diameter (mm) | 52 Drop-in | | Max. diameter x length (mm) | 128 x 232.7 | | Weight (g) | 1,940 | | Magnification with Extension Tube EF12 | 0.16 - 0.03 | | Magnification with Extension Tube EF25 | 0.20 -0.07 | | Lens hood | ET-120 | | Hard case | Lens Case 400 | | Soft case | - | | G.F.Holder III (hood III*) | NC | | G.F.Holder IV (hood IV*) | NC |
The world's first multi-layer DO element for telephoto lens Small and light High image quality Image Stabilization for equivalent effect of a shutter speed of two stops faster Highly resistant against dust and moisture
| • | The world's first multi-layer DO element for telephoto lens Small and light High image quality Image Stabilization for equivalent effect of a shutter speed of two stops faster Highly resistant against dust and moisture | | | | | • | Built to our professional standards with fast AF, full-time mechanical focus and dust and water-resistant construction | | | | | • | The EF 400mm f/4 DO IS USM is the worlds first super telephoto lens incorporating "Multi-Layer Diffractive Optical (DO) Element", for camera lenses, and is considered a major breakthrough. The outstanding feature, being its superb ability to correct chromatic aberrations. By incorporating this optical element in the optical design the EF 400mm f/4 IS USM is much smaller and lighter than a comparable lens having conventional optical elements. The Multi-Layer Diffractive Optical Element developed by Canon is a milestone optical element possessing the characteristics of both fluorite and aspherical elements, which has led to the production of high-performance camera lenses. |
|
