| I own it | I want it | I had it |
| 4 | 5 | 0 |
Manufacturer description: The EF 200-400mm f/4L IS USM Extender 1.4x features a flexible 200-400mm focal range with a fixed f/4 aperture, 4-stop optical Image Stabilizer and for the first time in a commercially available lens, a built-in 1.4x extender. These features combine to provide an outstandingly versatile lens for professional sports or wildlife photographers. A robust magnesium alloy design, environmental protection and specialised lens coatings also make it ideal for mobile use, combining with the finest quality optics to deliver exceptional results, even in the harshest conditions.
| Lens type | Zoom lens |
| Focal length | 200–400 mm |
| Image stab. | Yes (4 stops claimed) |
| Lens mount | Canon EF |
| Max aperture | F4.0 |
| Min aperture | F32.0 |
| Min focus | 2.00 m (78.74″) |
| Max magnification | 0.15 x |
| Weight | 3620 g (7.98 lb) |
| Length | 366 mm (14.41″) |
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