![]() | This article possibly contains
original research. (March 2009) |
![]() | |
Maker | Canon |
---|---|
Technical data | |
Type | Zoom |
Focus drive | Ultrasonic motor |
Focal length | 17β40mm |
Crop factor | 1.0 |
Aperture (max/min) | f/4βf/22 |
Close focus distance | 280mm / 11in |
Max. magnification | 0.24 (at 40mm) |
Diaphragm blades | 7 |
Construction | 12 elements in 9 groups |
Features | |
Short back focus | ![]() |
Lens-based stabilization | ![]() |
Macro capable | ![]() |
Application | Ultra-Wide Zoom |
Physical | |
Max. length | 96.8mm / 3.8in |
Diameter | 83.5mm / 3.3in |
Weight | 475g / 1.1lbs |
Filter diameter | 77mm |
Accessories | |
Lens hood | EW-83E, EW-83H, EW-83J |
Case | LP1319 |
Angle of view | |
Horizontal | 93Β°β49Β°20' |
Vertical | 70Β°30'β34Β° |
Diagonal | 104Β°β57Β°30' |
History | |
Introduction | 2003 |
Retail info | |
MSRP | $800 USD |
The EF 17β40mm f/4L USM lens is a wide-angle lens made by Canon Inc. The lens has an EF mount to work with the EOS line of cameras. Other than the front element, it is sealed against dust and water, and features a diaphragm which remains nearly circular from f/4 to f/8. It is one of the few Canon photo lenses that are parfocal. [1]
The 17β40mm is the least expensive of Canon's current wide-angle zooms for full-frame bodies, [2] with the EF 16β35mm f/4L IS USM and EF 11β24mm f/4L USM being more expensive, and the EF 16β35mm f/2.8L USM being both faster and more expensive. Weighing 475 g and measuring 83.5 mm x 96.8 mm, it is a popular choice with many photographers because of its light and compact size. [3] A member of the L-series, the 17β40mm is a good substitute for the 16β35mm f/2.8 lens, which is heavier and costs approximately twice as much. Canon now sells an image-stabilized 16β35mm f/4 lens for about $300 more than the 17β40.
This lens is also a popular step up from the stock kit lens on many of Canon's EOS Digital family of cameras, the EF-S 18β55mm f/3.5β5.6, for those still wanting a wide angle lens. On a cropped sensor, it has 35 mm equivalent focal length of 27β64mm. In this role, it is compared with the EF-S 17β55mm lens, with which it can unofficially share lens hoods.
This lens is often paired with an L series telephoto lens, such as the EF 28β300mm f/3.5β5.6 L USM or any of the EF 70β200mm family (f/4L USM, f/4L IS USM, f/2.8L USM, f/2.8L IS USM, f/2.8L IS II USM).
![]() | This article possibly contains
original research. (March 2009) |
![]() | |
Maker | Canon |
---|---|
Technical data | |
Type | Zoom |
Focus drive | Ultrasonic motor |
Focal length | 17β40mm |
Crop factor | 1.0 |
Aperture (max/min) | f/4βf/22 |
Close focus distance | 280mm / 11in |
Max. magnification | 0.24 (at 40mm) |
Diaphragm blades | 7 |
Construction | 12 elements in 9 groups |
Features | |
Short back focus | ![]() |
Lens-based stabilization | ![]() |
Macro capable | ![]() |
Application | Ultra-Wide Zoom |
Physical | |
Max. length | 96.8mm / 3.8in |
Diameter | 83.5mm / 3.3in |
Weight | 475g / 1.1lbs |
Filter diameter | 77mm |
Accessories | |
Lens hood | EW-83E, EW-83H, EW-83J |
Case | LP1319 |
Angle of view | |
Horizontal | 93Β°β49Β°20' |
Vertical | 70Β°30'β34Β° |
Diagonal | 104Β°β57Β°30' |
History | |
Introduction | 2003 |
Retail info | |
MSRP | $800 USD |
The EF 17β40mm f/4L USM lens is a wide-angle lens made by Canon Inc. The lens has an EF mount to work with the EOS line of cameras. Other than the front element, it is sealed against dust and water, and features a diaphragm which remains nearly circular from f/4 to f/8. It is one of the few Canon photo lenses that are parfocal. [1]
The 17β40mm is the least expensive of Canon's current wide-angle zooms for full-frame bodies, [2] with the EF 16β35mm f/4L IS USM and EF 11β24mm f/4L USM being more expensive, and the EF 16β35mm f/2.8L USM being both faster and more expensive. Weighing 475 g and measuring 83.5 mm x 96.8 mm, it is a popular choice with many photographers because of its light and compact size. [3] A member of the L-series, the 17β40mm is a good substitute for the 16β35mm f/2.8 lens, which is heavier and costs approximately twice as much. Canon now sells an image-stabilized 16β35mm f/4 lens for about $300 more than the 17β40.
This lens is also a popular step up from the stock kit lens on many of Canon's EOS Digital family of cameras, the EF-S 18β55mm f/3.5β5.6, for those still wanting a wide angle lens. On a cropped sensor, it has 35 mm equivalent focal length of 27β64mm. In this role, it is compared with the EF-S 17β55mm lens, with which it can unofficially share lens hoods.
This lens is often paired with an L series telephoto lens, such as the EF 28β300mm f/3.5β5.6 L USM or any of the EF 70β200mm family (f/4L USM, f/4L IS USM, f/2.8L USM, f/2.8L IS USM, f/2.8L IS II USM).