Canon EF 17–40mm lens

EF 17–40mm f/4L USM
Technical data

Maker	Canon
Type	Zoom
Focus drive	Ultrasonic motor
Focal length	17–40mm
Crop factor	1.0
Aperture (max/min)	f/4–f/22
Close focus distance	280mm / 11in
Max. magnification	0.24 (at 40mm)
Diaphragm blades	7
Construction	12 elements / 9 groups
Features
Short back focus	No
Lens-based stabilization	No
Macro capable	No
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
Case	LP1319
Angle of view
Horizontal	93°–49°20'
Vertical	70°30'–34°
Diagonal	104°–57°30'
History
Introduction	2003
Retail info
MSRP	$800 USD

The EF 17–40mm 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.

Audience

The 17–40mm is the least expensive of Canon's current wide-angle zooms for full-frame bodies,^[1] with the EF 16–35mm f/4L IS USM and EF 11–24mm f/4L USM being more expensive, and the EF 16–35mm 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.^[2] A member of the L-series, the 17–40mm is a good substitute for the 16–35mm f/2.8 lens, which is heavier and costs approximately twice as much. However, it should be noted that Canon now sells an image-stabilized 16–35mm f/4 lens for about $300 more than the 17–40.

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 18–55mm f/3.5–5.6, for those still wanting a wide angle lens. On a cropped sensor, it has 35 mm equivalent focal length of 27–64mm. In this role, it is compared with the EF-S 17–55mm lens.

Companion lenses

This lens is often paired with an L series telephoto lens, such as the EF 28–300mm f/3.5–5.6 L USM or any of the EF 70–200mm family (f/4L USM, f/4L IS USM, f/2.8L USM, f/2.8L IS USM, f/2.8L IS II USM).

Images

With the provided lens hood.
Weather-sealed lens mount with rear gelatin holder.
Diagram of the lens, highlighting its different controls and features.

References

↑ Canon offers three less expensive wide-angle zooms, but none of these three will mount on full-frame bodies. Two are EF-S lenses for Canon's APS-C DSLRs, and the other is an EF-M lens for the company's EOS M series of mirrorless cameras.
↑ "10 POPULAR POINTS OF THE CANON EF 17–40MM F/4.0 L USM LENS". Retrieved 5 September 2012.

External links

Wikimedia Commons has media related to Canon EF 17-40mm F4L USM.

Canon EF/EF-S/EF-M lenses

EF-S zoom	EF-S 10–18mm EF-S 10–22mm EF-S 15–85mm EF-S 17–55mm EF-S 17–85mm EF-S 18–55mm EF-S 18–135mm EF-S 18–200mm EF-S 55–250mm

Ultra-wide zoom	EF 11–24mm EF 16–35mm EF 17–40mm

Standard zoom	EF 24–70mm EF 24–105mm EF 28–135mm EF 28–300mm

Telephoto zoom	EF 70–200mm EF 70–300mm EF 75–300mm EF 100–400mm EF 200–400mm

Wide-angle prime	EF 14mm EF 20mm EF 24mm EF-S 24mm EF 28mm EF 35mm

Standard prime	EF 40mm EF 50mm

Telephoto prime	EF 85mm EF 100mm EF 135mm EF 200mm

Super telephoto prime	EF 300mm EF 400mm EF 500mm EF 600mm EF 800mm

Distorting lenses	EF 8–15mm Fisheye EF 135mm with Softfocus

Tilt-shift	TS-E 17mm TS-E 24mm TS-E 45mm TS-E 90mm

Macro	EF 50mm Compact Macro EF-S 60mm Macro MP-E 65mm 1–5x Macro EF 100mm Macro EF 180mm Macro

EF-M zoom	EF-M 11–22mm EF-M 15–45mm EF-M 18–55mm EF-M 55-200mm

EF-M prime	EF-M 22mm

Lens accessories	Extender EF

Discontinued zoom	EF 17–35mm EF 20–35mm EF 22–55mm EF 24–85mm EF 28–70mm EF 28–80mm EF 28–90mm EF 28–105mm EF 28–200mm EF 35–80mm EF 35–105mm EF 35–350mm EF 55–200mm EF 70–210mm EF 80–200mm EF 90–300mm EF 100–200mm EF 100–300mm

Discontinued prime	EF 15mm Fisheye EF 1200mm

This article is issued from Wikipedia - version of the Monday, April 11, 2016. The text is available under the Creative Commons Attribution/Share Alike but additional terms may apply for the media files.