Canon EF 17-40 mm f/4.0 L USM Ultra-Wide Angle Canon EF Zoom Lens – Black

May 15, 2018 - Comment

The EF17-40mm f/4L USM is an ultra wide angle Canon EF zoom lens meant for professional and high amateur SLR EOS camera users While it is an excellent lens when used with an analog SLR camera, the EF17-40mm f/4L USM is especially well suited for digital SLR cameras with an imaging sensor size smaller than

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(as of April 19, 2020 9:35 am BST - Details)

The EF17-40mm f/4L USM is an ultra wide angle Canon EF zoom lens meant for professional and high amateur SLR EOS camera users
While it is an excellent lens when used with an analog SLR camera, the EF17-40mm f/4L USM is especially well suited for digital SLR cameras with an imaging sensor size smaller than the 35mm format
Indeed on such digital SLR cameras these focal lengths can give an angle of view approximately equivalent to that of a 28-70mm lens used on a 35mm camera, which makes it the ideal standard zoom lens
The EF17-40mm f/4L USM has 12 lens elements arranged in 9 groups
Super Spectra Coating on the elements ensures excellent color balance and minimizes ghosting and flare
To provide superb image quality over a 17-40mm zoom range the lens uses three aspheric elements of two different types, while Super UD (Ultra-low Dispersion) glass is used to prevent the chromatic aberrations that often can degrade the subject edge clarity
Minimum focusing distance is just 28mm throughout the entire zoom range
The Auto-focus works silently and quickly thanks to a fast central processing unit with an improved AF algorithm
You can override AF mode with manual focus should you wish
Controlled by an electromagnetic diaphragm, the EF17-40mm f/4L USM’s circular aperture can achieve a more attractive appearance to out of focus background areas in a picture
The front of the lens does not rotate as you focus
This means, for example, that polarizing filters still function effectively as you zoom in and out
At the rear of the lens there’s a drop-in gelatin filter holder
Highly resistant to moisture and dust, the EF17-40mm f/4L USM is i

Product Features

  • Maximum Aperture: F/4.0
  • Minimum focus range: 28 cm
  • Focus adjustment: Ultrasonic Motor (USM) automatic, manual
  • Filter size: 77 mm
  • 12 month manufacturer’s warranty

Comments

Marko Darko says:

A gem of a lens I pretty much exclusively shoot landscape shots on a Canon 5D Mk II and had previously used a 24-105mm L f/4. Now, the 24-105 is an excellent all-round lens, but at 24mm it has massive barrel distortion – this is well known – so I usually have to correct this distortion if there’s any kind of straight-line horizon in shot, which obviously affect the quality of the pixels even with the most sophisticated lens correction software. This hasn’t really bothered me that much except on a few shots…

just me says:

worth the price and would use the seller again Have just gotten my first full frame camera and wanted a wide angle lens to go with my new camera, my crop frame wide angle lens sadly would not fit my new camera. I have always shot with canon cameras and canon L lens, but had now I have moved over to a Sony mirrorless a7ii full frame camera with a sigma mc-11 adapter. so I can still use all my canon lens, on my new camera and with this wide angle lens I can now shoot landscapes which is cool.The lens is well built true its second…

Soundie says:

Excellent lens Amazingly sharp L series lens. Fast focus with surprisingly low distortion for such a wide angle lens. Adobe Lightroom contains lens correction for this and most other lenses. Used with full frame Canon 5D ll

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