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

£849.99 (as of June 20, 2018, 2:44 am) & FREE Shipping. Details £559.99

Maximum Aperture: F/4.0
Minimum Focus Range: 28 cm
Focus Adjustment: Ultrasonic Motor (USM) Automatic, Manual

SKU: F10530039 Categories: ,


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
Whilst it is a superb 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, Whilst Super UD (Ultra-low Dispersion) glass is used to prevent the chromatic aberrations that ceaselessly can degrade the subject edge clarity
Minimum focusing distance is just 28mm during all of the zoom range
The Auto-Center of attention works silently and quickly thanks to a fast central processing unit with an improved AF algorithm
You’ll be able to override AF mode with manual Center of attention will have to 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 Center of attention background areas in a picture
The front of the lens does not rotate as you focus
This means, as an example, that polarizing filters still function effectively as you zoom in and out
At the rear of the lens there is a drop-in gelatin filter holder
Highly resistant to moisture and dust, the EF17-40mm f/4L USM is i
Maximum Aperture: F/4.0
Minimum Center of attention Range: 28 cm
Center of attention Adjustment: Ultrasonic Motor (USM) Automatic, Manual
Filter Size: 77 mm
12-month Manufacturer’s Warranty

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