www.testfreaks.com

Reviews, reviews, reviews...

8.8 out of 10 based on 2665 reviews

Canon EF 17-40mm f/4L USM

Information found in:

Great Deal: $749.00

  • User Score (2630)
    9.3 9.3 from 2630 reviewers
  • Expert Score (9)
    7.7 7.7 from 9 reviewers
  • Design (14)
    8.7 8.7 from 14 reviewers
  • Value for money (159)
    8.3 8.3 from 159 reviewers
  • Features (53)
    8.4 8.4 from 53 reviewers
  • Ease of use (50)
    9.3 9.3 from 50 reviewers
  • Performance (50)
    8.4 8.4 from 50 reviewers
  • Picture quality (46)
    8.8 8.8 from 46 reviewers
  • Durability (33)
    9.2 9.2 from 33 reviewers
  • Reliability (4)
    9.1 9.1 from 4 reviewers
  • Overall quality (59)
    7.5 7.5 from 59 reviewers
  • Battery performance (3)
    8.3 8.3 from 3 reviewers
  • Construction (14)
    8.8 8.8 from 14 reviewers
  • Speed performance (4)
    7.7 7.7 from 4 reviewers
  • Sharpness (4)
    9.6 9.6 from 4 reviewers
  • Build quality (7)
    8.7 8.7 from 7 reviewers
More grades Less grades
  • Best Deals

  • Score Distribution

Experts:
9-10
(1)
7-8
(7)
5-6
(1)
3-4
(0)
1-2
(0)
Users:
9-10
(1865)
7-8
(555)
5-6
(64)
3-4
(39)
1-2
(3)
  • Expert Reviews

  • WikiFreak Description

Canon EF 17-40mm f/4L USM

The Canon EF 17-40mm f/4L USM is a 12 element in 9 group lens with 93° - 49°20'/70°30' - 34°/104° - 57°30' angle of view (horizontal/vertical/diagonal) with 7 diaphragm blades. It has a minimum aperture setting of 32 - 38 with 0.28 m closest focusing distance. Its maximum magnification is 0.24 x (at 35 mm) through a USM AF actuator. The filter diameter is 77 mm. The unit measures 83.5 x 96.8 mm and weighs 500 g. It has 0.83-0.32 magnification with the EF12 extension tube a…

See more

Canon EF 17-40mm f/4L USM

The Canon EF 17-40mm f/4L USM is a 12 element in 9 group lens with 93° - 49°20'/70°30' - 34°/104° - 57°30' angle of view (horizontal/vertical/diagonal) with 7 diaphragm blades. It has a minimum aperture setting of 32 - 38 with 0.28 m closest focusing distance. Its maximum magnification is 0.24 x (at 35 mm) through a USM AF actuator. The filter diameter is 77 mm. The unit measures 83.5 x 96.8 mm and weighs 500 g. It has 0.83-0.32 magnification with the EF12 extension tube and 1.02-0.70 magnification with the EF25 extension tube. The unit comes with the EW-83EC lens hood and LP1319 soft case.

Features

The Canon EF 17-40mm f/4L USM features ultra wide lens for wide angle view and is suited for digital SLR cameras with an imaging sensor size smaller than the 35mm format. It features an angle of view approximately equivalent to that of a 28-70mm lens used on a 35mm camera. It has 12 lens elements arranged in 9 groups and Super Spectra Coating on the elements that ensures colour balance and minimises ghosting and flare. This lends features a 17-40mm zoom range where the lens uses three aspheric elements of two different types, and Super UD (Ultra-low Dispersion) glass is used to prevent the chromatic aberrations that often can degrade the subject edge clarity. This lens also features minimum focusing distance of 28mm throughout the entire zoom range. Other features are auto-focus which works silently via central processing unit with an improved AF algorithm; ability to override AF mode with manual focus when desired; an electromagnetic diaphragm to achieve circular aperture for out of focus background areas in a picture; polarising filters that still function effectively as users zoom in and out (at the rear of the lens there’s a drop-in gelatin filter holder) and is resistant to moisture and dust. The EF17-40mm f/4L USM is built with environment friendly lead-free glass is used throughout its construction.

See less
  • Manufacturer's Description

Ask the community

Need more advice? Ask the community a question.

Canon EF 17-40mm f/4L USM Deals

Current special offers from our most trusted merchants

Video Reviews