- Maximum aperture of 1:4
- 17 - 40mm focal length
- 3 Aspherical lens elements
- Super UD (Ultra-low Dispersion) glass element
- Ring-type ultrasonic motor
- Optical coatings
- Highly resistant to dust and moisture
- Compatibility: with APS-C and Full Frame Sensor DSLR Cameras
- 2 Years Genuine Warranty with Canon Australia
The new and affordable L-series comes to life with the Canon EF 17-40mm f/4L USM, an ultra-wide-angle zoom lens that's perfect for both film and digital SLRs. Its Optical coatings are improved for use with digital cameras. High-class optics is guaranteed by the use of 3 Aspherical lens elements, an additional feature to a Super UD (Ultra-low Dispersion) glass element. The lens has a maximum aperture of 1:4 and 17 - 40mm focal length. Constructed to pro standards, it’s also highly resistant to dust and moisture. It has a ring type USM for silent and high-speed AF operation. It is compatible with APS-C and Full Frame Sensor DSLR Cameras.
Product Features in Detail
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.
Minimum focusing distance is just 28cm throughout the entire zoom range.
Superior optical performanceThe 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.
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.
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.
Angle of view (horzntl, vertl, diagnl) 93° - 49°20', 70°30' - 34°, 104° - 57°30' No. of diaphragm blades 7 Minimum aperture 22 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 Focal Length & Maximum Aperture 17 - 40mm; 1:4 Lens Construction 12 elements in 9 groups Diagonal Angle of View 104° - 57° 30' Focus Adjustment Inner focusing system with USM Closest Focusing Distance 0.28m / 0.9 ft. Zoom System Rotating type Lens Cap E-77U / E-77II Lens hood EW-83E Hard case - Soft case LP1319 Extenders EF1.4x II and EF2x II Not compatible
This lens comes with 24 Months Warranty from Canon Australia.Our products are sourced from authorised Australian suppliers and therefore come with genuine Australian warranty.Camera Warehouse does not participate in 'Grey Market' or 'Parallel Import' activities.
- In the Box
Canon EF 17-40mm f/4L USMLens CapLens Dust Cap E (Rear)Lens HoodLens Case24 Months Warranty from Canon Australia
- User Reviews