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Canon EF 17-40mm f4.0L USM Review

Canon EF 17-40mm f4.0L USM

Main Features

  • 17-40mm Focal Range
  • F4.0 Max Aperture
  • Weather Sealed
  • Filter Thread: 77mm
  • Max Format: 35mm FF
  • Canon EF Mount
  • Weight: 500g.
  • Diameter: 84mm
  • Length: 97mm
  • Min Focus Distance:0.28m
  • Max Magnification:0.24x
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Canon 17-40mm f4.0L USM Overview

Canon 17-40mm f4.0L USM is an Auto Focus (AF) Ultra-Wideangle Zoom lens with 35mm FF max sensor coverage and it is designed to be used with Canon EF mount cameras.

Canon 17-40mm f4.0L USM is a member of Canon's EF L series of lenses. Below you can see the latest lenses in this series.

EF L Series Lenses in Canon EF Mount
Model Coverage Weight Focusing Street Price
Canon EF 400mm F2.8L IS III USM Lens Canon EF 400mm F2.8L IS III USM
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35mm FF 2840gr AF Amazon B&H Photo
Canon EF 600mm F4L IS III USM Lens Canon EF 600mm F4L IS III USM
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35mm FF 3050gr AF Amazon B&H Photo
Canon EF 70-200 F2.8L IS III USM Lens Canon EF 70-200 F2.8L IS III USM
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35mm FF 1440gr AF Amazon B&H Photo
Canon EF 70-200 F4L IS II USM Lens Canon EF 70-200 F4L IS II USM
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35mm FF 780gr AF Amazon B&H Photo
Canon TS-E 90mm F2.8L Macro Lens Canon TS-E 90mm F2.8L Macro
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35mm FF 915gr MF Amazon B&H Photo

Lens Mount

Canon 17-40mm f4.0L USM is compatible with cameras that have Canon EF lens mount. Some of the latest released cameras that are compatible with the Canon EF lenses are Canon 1D X III, Canon 6D MII and Canon 5D MIV.

Focal Range

Canon 17-40mm f4.0L USM has a focal range of 17-40mm and 2.4X zoom ratio. When it is mounted on an APS-C sensor camera with 1.6x crop, it provides an 35mm (FF) equivalent of 27.2 - 64mm.


Weather Sealings

Canon 17-40mm f4.0L USM is a weather sealed lens which provides an extra protection to prevent water and dust get inside the lens and camera body under light rain, snow and wind. In order to have an effective protection, you have to pair the Canon 17-40mm f4.0L USM with a weather sealed camera body such as Canon 1D X III, Canon 6D MII and Canon 5D MIV.

Optical Image Stabilization

Canon 17-40mm f4.0L USM doesn't have an optical image stabilization system so the only option to stabilize the image taken with this lens is to mount on a camera body with IBIS (sensor based In-body image stabilization).

Alternatively, you can check the Canon 16-35mm f4L IS USM in Canon EF mount that have similar focal range but features Optical Image Stabilization.

Lenses Similar to Canon 17-40mm f4.0L USM With Optical Image Stabilization
Model Coverage Weight Focusing Street Price
Canon EF 16-35mm f4L IS USM Lens Canon EF 16-35mm f4L IS USM
Compare
35mm FF 615gr AF Amazon B&H Photo

Zoom Method

Canon 17-40mm f4.0L USM features Rotary (internal) zoom method where the length of the lens doesn't change while you are zooming in or out. Even though this design has a size disadvantage in general compare to extending designs, it has the benefits of better sealing against dust and moisture, no zoom creep and no weight balance shift while zooming.

Maximum Magnification Ratio

Canon 17-40mm f4.0L USM has a Max Magnification Ratio of 0.24x and has a minimum focusing distance of 0.28m.

Aperture

Canon 17-40mm f4.0L USM is a fixed aperture lens with a constant max aperture of f4 from 17mm all the way to the 40mm .

Optical Formula

Canon 17-40mm f4.0L USM's optical formula consists of 12 elements in 9 groups . Special elements used in this design is Super Spectra coatings.

Lens Hood

Canon 17-40mm f4.0L USM doesn't come with a lens hood but there is an optional lens hood with a part code of EW-83E that you can order separately.

Body Colour

Canon 17-40mm f4.0L USM is available in Black color.

Popular Comparisons of Canon 17-40mm f4.0L USM

Here is the eight most popular comparisons of Canon 17-40mm f4.0L USM amongst Camera Decision readers.

Top Alternatives of Canon 17-40mm f4.0L USM Lens
Model Coverage Weight Focusing Street Price
Canon EF 16-35mm f4L IS USM Lens Canon EF 16-35mm f4L IS USM
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35mm FF 615gr AF Amazon B&H Photo
Sigma 18-35mm F1.8 DC HSM Lens Sigma 18-35mm F1.8 DC HSM
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APS-C / DX 810gr AF Amazon B&H Photo
Tokina AT-X 17-35mm f4 Pro FX Lens Tokina AT-X 17-35mm f4 Pro FX
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35mm FF 600gr AF Amazon B&H Photo
Sigma 17-50mm F2.8 EX DC OS HSM Lens Sigma 17-50mm F2.8 EX DC OS HSM
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APS-C / DX 565gr AF Amazon B&H Photo
Canon EF 24-105mm f4L IS USM Lens Canon EF 24-105mm f4L IS USM
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35mm FF 670gr AF Amazon B&H Photo
Canon EF 16-35mm f2.8L II USM Lens Canon EF 16-35mm f2.8L II USM
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35mm FF 635gr AF Amazon B&H Photo
Tokina AF-X Pro 16-50mm f2.8 DX Lens Tokina AF-X Pro 16-50mm f2.8 DX
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APS-C / DX 610gr AF Amazon B&H Photo
Canon RF 14-35mm F4L IS USM Lens Canon RF 14-35mm F4L IS USM
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35mm FF 540gr AF Amazon B&H Photo

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**This post contains affiliate links and I will be compensated if you make a purchase after clicking through my links. As an Amazon Associate I earn from qualifying purchases.

Pros and Cons of Canon EF 17-40mm f4.0L USM


PROs
Weather Sealed
Built-in Autofocus
Full-time Manual Focusing
Internal Focusing
Fast and Bright at Tele end
Constant f4 Aperture throughout the range
Covers Full-Frame Sensor

CONs
Slow Aperture at Wide end
Canon EF 17-40mm f4.0L USM Alternatives in Canon EF Mount
Model Coverage Weight Focusing Street Price
Canon EF 16-35mm f2.8L II USM Lens Canon EF 16-35mm f2.8L II USM
Compare
35mm FF 635gr AF Amazon B&H Photo
Canon EF 16-35mm f2.8L USM Lens Canon EF 16-35mm f2.8L USM
Compare
35mm FF 600gr AF Amazon B&H Photo
Canon EF 20-35mm f3.5-4.5 USM Lens Canon EF 20-35mm f3.5-4.5 USM
Compare
35mm FF 340gr AF Amazon B&H Photo
Canon EF 16-35mm f4L IS USM Lens Canon EF 16-35mm f4L IS USM
Compare
35mm FF 615gr AF Amazon B&H Photo
Canon EF 16-35mm F2.8L III USM Lens Canon EF 16-35mm F2.8L III USM
Compare
35mm FF 790gr AF Amazon B&H Photo
Tokina AT-X 17-35mm f4 Pro FX Lens Tokina AT-X 17-35mm f4 Pro FX
Compare
35mm FF 600gr AF Amazon B&H Photo
Tamron 17-35mm F2.8-4 Di OSD Lens Tamron 17-35mm F2.8-4 Di OSD
Compare
35mm FF 460gr AF Amazon B&H Photo
Tamron SP AF 17-35mm F2.8-4 Di LD Aspherical IF Lens Tamron SP AF 17-35mm F2.8-4 Di LD Aspherical IF
Compare
35mm FF 440gr AF Amazon B&H Photo

Canon 17-40mm f4.0L USM Detailed Specifications


General
Brand Canon
Lens Type Zoom
Lens Type Wideangle Zoom
Lens Mount Canon EF
Max Format 35mm FF
Focal Range 17-40mm
Image Stabilization No
Colour Black
Zoom Method Rotary (internal)
Power Zoom No
Zoom Lock No
Zoom Ratio 2.4X
APERTURE
Max Aperture F4.0
Min Aperture F22.0
Aperture Ring No
Diaphragm Blades 7
Optics
Optical Elements 12
Optical Groups 9
Special Elements Super Spectra coatings

FOCUSING
Min Focus Distance 0.28m
Max Magnification 0.24X
Autofocus Yes
AF Motor Type Ultrasonic
Full Time Manual Yes
Focus Method Internal
Distance Scale Yes
DoF Scale Yes
PHYSICAL SPECS
Weight 500g
Diameter 84mm
Length 97mm
Materials Metal barrel, metal mount
Weather Sealing Yes
Filter Thread 77mm
Filter Notes -
Hood Code EW-83E
Tripod Collar No
Optional Accessories Soft Case LP1319
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Frequently Asked Questions about Canon EF 17-40mm f4.0L USM
is the Canon EF 17-40mm f4.0L USM a Weather Sealed lens?
What is the Minimum Focusing Distance of Canon EF 17-40mm f4.0L USM
is the Canon EF 17-40mm f4.0L USM an Autofocus (AF) lens?
What is the Filter Thread Size of Canon EF 17-40mm f4.0L USM
Does Canon EF 17-40mm f4.0L USM have Image Stabilization?
Does Canon EF 17-40mm f4.0L USM have Aperture Ring?
What is the Maximum Magnification Ratio of Canon EF 17-40mm f4.0L USM
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