Canon EF 17-40mm f4L USM
- UV Filter
- Lens Caps
- Lens Pouch
- Superb optical performance throughout the zoom range.
- Fastest AF speed within its class (same as the EF16-35 f/2.8L USM)
- Highly dust and moisture resistant
- 28cm minimum focusing distance at all focal lengths
| Angle of view (horzntl, vertl, diagnl) | 93 degrees - 49 degrees 20', 70 degrees 30' - 34 degrees, 104 degrees - 57 degrees 30' |
| Lens construction (elements/groups) | 12/9 |
| No. of diaphragm blades | 7 |
| Minimum aperture | 22 |
| Closest focusing distance(m) | 0.28 |
| Maximum magnification (x) | 0.24 (at 35mm) |
| AF actuator | USM (1) |
| Filter diameter (mm) | 77 |
| Max. diameter x length (mm) | 83.5 x 96.8 |
| Weight (g) | 500 |
| Magnification - Extension Tube EF12 II | 0.83 - 0.32 |
| Magnification - Extension Tube EF25 II | 1.02 - 0.70 (1) |
| Lens hood | EW-83E |
| Soft case | LP1319 |
| G.F.Holder III (hood III*) | NC |
| G.F.Holder IV (hood IV*) | (0) |
| AF actuator | (1) Mechanical full-time manual focusing built-in |
| Magnification - Extension Tube EF25 II | (1) Only compatible at tele |
| *Maximum number of Hood III/IV attachable. In case of zoom lenses, the maximum number applies to the short focal length |