Canon EF 17-40mm f/4L USM Lens

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100777
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product overview
product overview
  • EF-Mount Lens/Full-Frame Format
  • Aperture Range: f/4 to f/22
  • One Super Ultra-Low Dispersion Element
  • Three Aspherical Element
  • Super Spectra Coating
  • Ring-Type Ultrasonic Motor AF System
  • Weather-Sealed Construction
  • Rounded 7-Blade Diaphragm

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.

Wide-angle zoom is designed for full-frame Canon EF-mount DSLRs, however can also be used with APS-C models where it provides a 27.2-64mm equivalent focal length range.
Constant f/4 maximum aperture maintains consistent illumination throughout the zoom range.
One Super Ultra-Low Dispersion glass element noticeably reduces color fringing and chromatic aberrations for high clarity and color fidelity.
Three aspherical elements minimize spherical aberrations and distortions for improved sharpness and accurate rendering.
Super Spectra coating has been applied to individual elements to minimize ghosting and flare for greater contrast and color neutrality when working in strong lighting conditions.
A ring-type Ultrasonic Motor (USM), along with an internal focusing system, is employed to deliver fast, precise, and quiet autofocus performance as well as full-time manual focus override.
Rounded seven-blade diaphragm contributes to a pleasing out of focus quality that benefits the use of shallow depth of field and selective focus techniques.
As a member of the esteemed L-series, this lens is sealed against dust and moisture for working in inclement environmental conditions.
In addition to the front 77mm filter ring, this lens also has a rear filter holder for up to three cut gel filters.
  • MPN - EF17-40L
  • GTIN - 4960999189949
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Brand Canon
Focal Length 17 - 40mm
Comparable APS-C 1.6x Focal Length: 27 - 64 mm
Lens type Zoom lens
Aperture Range Maximum: f/4
Minimum: f/22
Max Format size 35mm Full Frame
Camera Mount Canon EF
Lens Format 35mm Film / Full-Frame Digital Sensor Canon (APS-C)
Lens mount Canon EF
Minimum Focusing Distance 11.02“ (28 cm)
Focus Type Autofocus
Minimum aperture F22.0
Image Stabilizer No
Diaphragm Blades 7
Angle Of View 104 - 57 30’
Elements 12
Groups 9
Diaphragm Blades 7
Special Elements/Coatings Super Spectra coatings
Filter Size Front: 77 mm
Tripod Collar No
Autofocus Yes
Elements 12
Motor Type Ultrasonic
Weight 500
Dimensions (DxL) Approx. 3.29 x 3.81“ (83.5 x 96.8 mm)
Diameter 84 mm
Weight 475 g
Length 97 mm
Sealing Yes
Filter Thread 77 mm
Lens Hood Canon EW-83E
Focal Length 17 to 40mm
Filter Thread Size Front: 77 mm
Dimensions(DxL) 83.5 x 96.8 mm
Weight 500 g
Autofocus Yes
Aperture Maximum: f/4
Minimum: f/22
Camera Mount Type Canon EF
Format Compatibility 35mm Film / Full-Frame Digital Sensor
Angle of View 104 to 57 30'
Minimum Focus Distance 28 cm
Magnification 0.24x
Maximum Reproduction Ratio 1:4
Optical Design 12 Elements in 9 Groups
Diaphragm Blades 7, Rounded
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What’s In The Box
  • Canon EF 17-40mm f/4L USM Lens
  • E-77 II 77mm Lens Cap x1
  • Lens Dust Cap E (Rear) x1
  • EW-83E Lens Hood x1
  • Lens Case LP1319 x1
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