Canon EF 17-40mm 4.0L USM Lens
Behold the Canon EF 17-40mm f/4.0L USM wide-angle zoom lens and see the world from a whole new perspective. Canon's individual interchangeable lenses have been designed to meet a wide range of photography requirements and are the ideal tool to help users capture beautiful images.
The lightweight lens provides amazing optical performance with a 17-40mm zoom range, complemented by 28cm minimum focusing distance for getting up close and personal. The EF 17-40mm lens is best suited for use with digital EOS SLR (Single-Lens Reflex) cameras with a focusing length conversion higher than 1. When used with an APS-C equipped DSLR, the Canon lens offers an angle view equivalent to a 28-70mm lens on a full-frame camera and the lens device itself doesn't rotate, so that specialised filters can be used easily, such as polarisers.
Offering a super-fast autofocus speed, one of the best in its class, the easy to use Canon Electro-Focus lens has been designed for both professional and amateur photographers. With the lens firmly in your hand you'll experience superior image quality thanks to its Super Spectra coating which produces excellent colour balance and eradicates ghosting and flare. The Super UD (Ultra-low Dispersion) lead-free glass of the intelligent interchangeable lens prevents chromatic aberrations whilst being resistant to dust and moisture, so you can be reassured that photos will be free from imperfections.
In addition to its extensive set of high-end, quality features, the lens' autofocus works silently and is driven by a ring-type ultrasonic motor to maximise its processing speed. The Canon EF 17-40mm 4.0L USM Lens is an ultra-compact, robust yet super lightweight professional addition to your Canon camera which will work with you to produce exceptional photographs, every time.
||Canon EF 17-40mm 4.0L USM Lens|
||Camera Lens |
|Lens construction (elements/groups)
|No. of diaphragm blades
|Closest focusing distance (m)
|Maximum magnification (x)
||0.24 (at 35mm)|
|Filter diameter (mm)
|Max. diameter x length (mm)
||83.5 x 96.8|
|Magnification - Extension Tube EF12 II
||0.83 - 0.32|
|Magnification - Extension Tube EF25 II
||1.02 - 0.70¹|
A Closer Look