Canon EF 17-40mm f/4L USM

Canon EF 17-40mm f/4L USM

Lens Summary

Brand: Canon

Also Known As: Canon 17-40mm f/4L

Lens Type: Zoom Lens

Format: Full Frame / FX

Focus: Autofocus

Lens Mount: Canon EF

Release Date: 2003-02-27

MSRP Price: $750

Made in: Japan

Infrared Rating: Mixed

Production Status: In Production

Lens Description: A new and affordable L-series ultra-wide-angle zoom lens that's ideal for both film and digital SLRs. Superior optics are assured by the use of three Aspherical lens elements, in addition to a Super UD (Ultra-low Dispersion) glass element. Optical coatings are optimized for use with digital cameras. This lens focuses as close as 11 inches (0.28m), and offers both Canon's full-time manual focus and a powerful ring-type USM for fast and silent AF. It has a constant f/4 maximum aperture, and offers the choice of screw-in 77mm filters or a holder in the rear of the lens for up to three gel filters. Finally, it offers weather-resistant construction similar to other high-end L-series lenses


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

Lens Specifications
Lens TypeZoom Lens
Focal Length17-40mm
Mount TypeCanon EF
FormatFull Frame / FX
Compatible Format(s)35mm / Full Frame
Compatible with TeleconvertersNo
Zoom Ratio2.3x
Maximum Reproduction Ratio1:4.1
Image Stabilizer (Image Stabilization)No
Aperture Information
Aperture RingNo
Maximim Aperturef/4
Minimum Aperturef/22
Maximum Angle of View (Full frame or larger format)104°-57°
Optical Information
Lens Elements12
Lens Groups9
Diaphragm Blades7
Super Spectra CoatingYes
Focus Information
FocusAutofocus
Built-in Focus MotorYes
UltraSonic Motor (USM)Yes
Internal FocusingYes
Minimum Focus Distance0.28m
Distance InformationYes
Filter Information
Filter Size77mm
Accepts Filter TypeScrew-on
Physical Characteristics
Weather / Dust SealingYes
Mount MaterialMetal
Dimensions8.38 x 9.65cm
Weight476g
Other Information
Available in ColorsBlack

Construction

EF 17-40mm f4L USM diagram

MTF Chart

Canon EF 17-40mm f/4L USM MTF Wide EF 17-40mm f4L USM chart tele

About Nasim Mansurov

Nasim Mansurov is the author and founder of Photography Life, based out of Denver, Colorado. He is recognized as one of the leading educators in the photography industry, conducting workshops, producing educational videos and frequently writing content for Photography Life. You can follow him on Instagram and Facebook. Read more about Nasim here.

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