Spanning a versatile wide-angle range, the EF 17-40mm f/4L USM Lens is a Canon L-series zoom featuring a constant f/4 maximum aperture along with a sophisticated optical design and durable construction. One Super UD element is featured, along with three aspherical elements, which help to reduce both chromatic and spherical aberrations in order to realize high sharpness, clarity, and color accuracy. A Super Spectra coating has also been applied to suppress flare and ghosting for improved contrast in difficult lighting conditions. Complementing the imaging capabilities, this wide-angle zoom also features a ring-type USM and internal focusing mechanism to afford quick, quiet, and accurate autofocus performance, as well as full-time manual focus override. Additionally, this lens is weather-sealed for use in trying environmental conditions.
- EF-Mount Lens/Full-Frame Format
- Aperture Range: f/4 to f/22
- One Super Ultra-Low Dispersion Element
- Three Aspherical Element
Canon EF 17-40mm f/4L USM Overview
Canon EF 17-40mm f/4L USM Specs
17 to 40mm
|Lens Format Coverage|
|Angle of View|
104° to 57° 30'
|Minimum Focus Distance|
11.02" / 28 cm
12 Elements in 9 Groups
77 mm (Front)
Gel Filter (Rear)
|Dimensions (ø x L)|
3.29 x 3.81" / 83.57 x 96.77 mm
|Length at Maximum Extension|
3.82" / 97 mm
1.1 lb / 500 g
|Box Dimensions (LxWxH)|
8.1 x 5.4 x 5.4"
Canon EF 17-40mm f/4L USM Reviews
I have only used this lens a couple time since my purchase but so far I am very happy with it. Nice sharp photos!
It's staying in my camera bag!
Wonderful lens for event photography. I recently did an outdoor event and this lens was the perfect lens for my all day shoot. I am so happy I finally pulled the trigger and purchased it.
I haven't used it too much yet but love it so far for landscape and city scape photography. Good quality lens and very versatile.
Used his lens on several real estate shoots, it’s been a great addition to my kit and my new primary lens for Real Estate.
A long desire
I have been wanting this lens for years. Always waiting for the timing and the great B&H sale price to coincide. I got it and it's an absolute joy to use.
Nice lens for your Canon cameras
Good quality and small lens for your camera. Just fits perfect on your Canon cameras and perfect image. Perfect price for this type of lens.
Canon EF 17=40 mm f/4L USM Lens
Perfect lens for the work I have to do. My clients love the image it produces.