Ultra wide lens for analogue EOS SLR camerasThe EF17-40mm f/4L USM is an ultra wide angle Canon EF zoom lens meant for professional and high amateur SLR EOS camera users. Standard zoom lens for digital EOS SLR camerasWhile it is an excellent lens when used with an analogue 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.Superior optical performanceThe EF17-40mm f/4L USM has 12 lens elements arranged in 9 groups. Super Spectra Coating on the elements ensures excellent colour balance and minimises 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.Extensive set of high-end featuresMinimum 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 polarising 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 ideally suited for use in harsh environments. Environment friendly lead-free glass is used throughout its construction.
(based on 6 reviews)
of respondents would recommend this to a friend.
Reviewed by 6 customers
Displaying reviews 1-6
Back to top
Excellent Lens For The Price
from Monroe, LA
About Me Semi-pro Photographer
Comments about EF 17-40mm F/4 L USM Lens, With Canon 1-Year USA Warranty:
excellent wide angle when paired with a ff body
Bottom Line Yes, I would recommend this to a friend
Was this review helpful? Yes / No
- You may also flag this review
(1 of 1 customers found this review helpful)
A lens for all seasons
By Great Dane
from Weatherford, TX
About Me Photo Enthusiast
Great for landscapes, sunrises, and sunsets - particularly in combination with graduated neutral density filters to balance exposure of land and sky.Amazing for indoor room photos - a must for any Realtor.Superior for architects' pictures of structures.Fine opportunities for creative "street photos" with artistic approaches and unique angles.
Images shared by Great Dane
West Texas Sunrise
Tags: Made with Product, Using Product
from New Orleans, La.
very fast. accurate. easy to use. heavy.
North to Alaska
from Lakewood, CA
About Me Casual Photographer
I took this lens to Alaska and it worked well for wide angle shots of the mountains and glaciers. I then used it as in a garden setting as a macro lens. It worked well and I was very pleased with the results.
very nice product
from new york
very nice.. even sharp under low light and low speed.
(3 of 8 customers found this review helpful)
Good Lens for my use
Own EFS 17-85mm.Ok Lens but wanted a constant better optic.Lens still being tested with cropped sensor body.