Canon 17-40mm f4.0L USM is a Fixed aperture Auto Focus (AF)
Ultra-Wideangle Zoom lens with 35mm FF max sensor coverage, and it is designed to be used with
EF Mount cameras.
What type of photography is the Canon 17-40mm f4.0L USM lens good for?
The type of photography that you are planning to use the Canon 17-40mm f4.0L USM is an important decision factor. Here we have evaluated its suitability to various photography scenarios:
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
Reasons to Buy Canon EF 17-40mm f4.0L USM Lens
Here we've included a summary of the advantages and disadvantages of the Canon EF 17-40mm f4.0L USM lens in a list form to help you determine whether it offers the features you need.
| Weather-sealed |
| Autofocus |
| Distance Scale |
| DoF(Depth of Field) Scale |
| Full-time Manual Focusing |
| Internal Focusing |
| Fast Aperture at Tele end |
| Constant f4 aperture throughout the range |
| Covers Full-Frame Sensor |
| Extreme Wide-angle capability |
| Minimum focus distance of 0.28m / 11.0 inch |
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We couldn't find any significant Cons for the Canon EF 17-40mm f4.0L USM
Lens Mount
Canon 17-40mm f4.0L USM is compatible with cameras that have a 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.
Size, Weight and Filter Thread
Size and weight is a very important decision factor when searching for your next lens. Canon 17-40mm f4.0L USM has a maximum diameter of 84mm and total length of 97mm. It weighs 500g / 17.6 oz.
Canon 17-40mm f4.0L USM has a filter thread of 77mm. Below are links to the filters that we recommend you to consider for your Canon 17-40mm f4.0L USM:
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
The Canon 17-40mm f4.0L USM is a weather-sealed lens, which provides extra protection to prevent water and dust get inside the lens and camera body under light rain, snow and wind. In order to have effective protection, you have to pair the Canon 17-40mm f4.0L USM with a weather-sealed camera body such as the 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
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 compared 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.
Below are the 3 Ultra-Wideangle Zoom type Canon12 mount lens alternatives with highest max magnification ratios:
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 .
| Focal Length |
Max Aperture |
Min Aperture |
|
17mm
|
F4 |
F22 |
|
40mm
|
F4 |
F22 |
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.
Body Colour
Canon 17-40mm f4.0L USM is available in Black color.
Popular Comparisons of Canon 17-40mm f4.0L USM
Here are the eight most popular comparisons of the Canon 17-40mm f4.0L USM amongst Camera Decision readers.
Top Alternatives of Canon 17-40mm f4.0L USM Lens
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