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Canon EF 17-40mm f/4.0L USM Lens

by Canon
Ship in 3-5 Days - Call For Availability
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Original price £779.99
Original price £779.99 - Original price £779.99
Original price £779.99
Current price £769.00 incl. VAT
£769.00 - £769.00
Current price £769.00 incl. VAT
SKU CANN306

EF 17-40mm f/4L USM

The EF 17-40mm f/4L USM is a lightweight ultra wide angle Canon EF zoom lens. It is especially well suited for use with digital EOS SLR cameras with a focal length conversion factor higher than 1. This lens offers excellent image quality and a constant maximum aperture. Its compact, lightweight body makes it an ideal travelling companion.

Features:

  • Superb optical performance throughout the zoom range
  • Fast autofocus speed
  • Highly resistant to dust and moisture
  • 28cm minimum focusing distance at all focal lengths

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.

Aperture Blades: 7
Filter Size: 77mm
Lens Cap: E-77U
Lens Hood: EW-83E
Max Aperture (Tele): 4
Max Focal Length: 40
Size: ø83.5 x 96.8
Type: Zoom Lens
Closest Focus: 0.28 m
Image Stabilisation: No
Lens Elements: 12
Lens Groups: 9
Max Aperture (Wide): 4
Min Focal Length: 17
Weight (g): 475