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Canon EF 17-40mm f/4L USM
The EF 17-40mm f/4L USM is an ultra wide-angle zoom lens that offers excellent image quality and a constant maximum aperture. Its compact, lightweight body makes it an ideal travelling companion.
Ultra-wide or standard zoom
The EF 17-40mm f/4L USM acts as an ultra-wide angle zoom on film or full-frame digital EOS cameras. On DSLRs equipped with APS-C sized sensors it acts as a standard zoom, giving an angle of view equivalent to a 28-70mm lens on a full-frame camera.
Close focusing
Minimum focusing distance is just 28cm throughout the entire zoom range.
Superior optical performance
The EF17-40mm f/4L USM has 12 lens elements arranged in nine groups. Super Spectra coating ensures excellent colour balance and minimises ghosting and flare. To provide superb image quality over the complete 17-40mm zoom range the lens uses three aspheric elements. Super UD (Ultra-low Dispersion) glass prevents chromatic aberrations.
Ultrasonic focusing
A ring-type ultrasonic motor drives autofocus extremely quickly, and in near silence. Excellent holding torque ensures the point of focus is reached accurately, without overshooting. Furthermore, full-time manual override is available, making it possible to adjust focus without leaving AF mode.
Non-rotating front element
The front of the lens does not rotate, which makes using specialised filters, such as polarisers and graduates, easier. A drop-in gelatine-filter holder can be found at the back of the lens.
Smooth background blur
A virtually circular aperture diaphragm gives out of focus regions a softer, more uniform feel. Sharp foreground objects stand out against a smooth blurred background.
Weather resistant
Highly resistant to moisture and dust, the EF17-40mm f/4L USM is ideally suited for use in harsh environments. Environment friendly lead-free glass is used throughout its construction.
Delivery Contents:
• Canon EF 17-40mm f/4L USM
• Lens hood EW-83E
• Soft casel LP1319
You have a question about this product? We are here for you! Call us at +49 (0)6155 8877766 or test the product in our specialist store in 64347 Griesheim, Kirschberg 27.
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Specifications
| Angle of view (horzntl, vertl, diagnl) | 93° - 49°20, 70°30 - 34°, 104° - 57°30 |
| Lens construction (elements/groups) | 12. Sep |
| No. of diaphragm blades | 7 |
| Minimum aperture | 22 |
| Closest focusing distance (m) | 0.28 |
| Maximum magnification (x) | 0.24 (at 35mm) |
| AF actuator | USM¹ |
| 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 - 0.70¹ |
| Lens Cap | E-77U / E-77II |
| Lens hood | EW-83E |
| Hard case | - |
| Soft case | LP1319 |
| Extenders EF1.4x II and EF2x II | Not compatible |
| Lens mount | Canon EF |
| Lens Format Coverage | Full Frame |
| Lens Design | Zoom Lenses |
| Focus Type | Autofocus |
| Image Stabilization | No |
| Lens type | wideangle |
| Filter size | 77mm |
| Maximum Aperture | f/4 |
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