Canon EF 17-40mm f/4L USM Wide Lens

  • £800
  • £709.00

Approx Delivery 7-14 Days



  • Canon EF Full frame lens
  • Superb optical performance
  • Constant f/4 max aperture
  • APS-C equiv' 28-70mm
  • Fast autofocus
  • Weather sealed
  • 28cm minimum focusing
  • Ultrasonic focusing
  • Includes hood & pouch

An ultra wide-angle zoom lens that offers excellent image quality and a constant maximum aperture.
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.

Canon EF 17-40mm f/4L USM Lens
Focal Length (35mm Equiv)
17-40mm
Max Aperture
f4
Minimum Aperture
f22
Minimum Focus (cm)
28
Lens Mount
Canon EF
Sensor format
Full Frame
Aperture blades
7
Dust / Moisture resistance
Yes
Stabilisation
No
Filter Thread (mm)
77
Size (mm)
83.5 x 96.8
Weight (g)
500
Colour
Black
Hood
EW-83E
Accessories Included
Caps / Hood / Pouch

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