| EF 17-40mm f/4L USM | |
| Key features | |
|---|---|
| Maker: | Canon |
| Image stabilization: | No |
| Ultrasonic motor: | Yes |
| Short back focus: | No |
| Macro capable: | No |
| Application: | Ultra-Wide Zoom |
| Technical data | |
| Type: | Zoom |
| Focal length: | 17-40mm |
| Frame coverage: | Full frame |
| Aperture (max/min): | f/4 - f/22 |
| Construction: | 9 groups / 12 elements |
| # Diaphragm blades: | 7 |
| Close focus distance: | 280mm / 11in |
| Max. magnification: | 0.24 (at 40mm) |
| Physical | |
| Max. diameter: | 83.5mm / 3.3in |
| Max. length: | 96.8mm / 3.8in |
| Weight: | 475g / 1.1lbs |
| Filter diameter: | 77mm |
| Accessories | |
| Lens hood: | EW-83E |
| Case: | LP1319 |
| Angle of view | |
| Horizontal: | 84° – 34° |
| Vertical: | 53° – 19°30' |
| Diagonal: | 104° – 57°30' |
| History | |
| Introduced: | 2003 |
| Retail info | |
| MSRP US$ | $850 |
The EF 17-40mm f/4L USM lens is a wide-angle lens made by Canon Inc. The lens has an EF mount to work with the EOS line of cameras. Other than the front element, it is sealed against dust and water, and features a diaphragm which remains nearly circular from f/4 to f/8.
Contents |
The 17-40mm is the least expensive of Canon's wide angle zooms, with the EF 16-35mm f/2.8L USM and the EF 20-35mm f/2.8L being both faster and more expensive.
A member of the L-series, the 17-40mm is a good substitute for the 16-35mm lens, which is heavier and costs approximately twice as much.
This lens is also a popular step up from the stock kit lens on many of Canon's EOS Digital family of cameras, the EF-S 18-55mm f/3.5-5.6, for those still wanting a wide angle lens. On a cropped sensor, it has 35 mm equivalent focal length of 27-64mm. In this role, it is compared with the EF-S 17-55mm lens.
This lens is often paired with an L series telephoto lens, such as the EF 28-300mm f/3.5-5.6 L USM or any of the EF 70-200mm family (f/4L USM, f/4L IS USM, f/2.8L USM, f/2.8L IS USM).
|
||||||||||||||||||||||||||||||||||||||||||||