Canon Zoom Super Wide Angle EF 17-40mm f/4L USM Autofocus Lens

Canon

Product #:: CNL5002

Manufacturer #:: 8806A002

Rated 5.0 out of 5 stars.

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- Ultra wide angle zoom lens
- Ideal for both film and DSLRs
- Ultra-low dispersion

Lens Type:: Wide Angle Zoom

Lens Type:: This is the type of lens.

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Canon Zoom Super Wide Angle EF 17-40mm f/4L USM Autofocus Lens

Overview
Product Reviews
Specifications
In The Box
Accessories

Overview

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.

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wide&sharp

Reviewed on Monday, May 3, 2010

By:

Rated 5.0 out of 5 stars.

My favorite lens. It is super sharp I can't express the super enough. Takes gorgeous wide angle pictures--even when the lighting is not perfect. I've been happy with almost all my photographs taken with this lens & that is saying a lot. It gives a wonderful wide view appearance without the small "fisheye" look some other wide angle lenses tend to give off. The construction is very strong and the auto focus is fast.

Brand
Canon

Physical Specifications
Length:	3-3/4 in.
Length: The measurement of something from end to end. View All Attribute Definitions
Weight:	1.1 lbs.
Weight: The physical weight of the item without packaging. View All Attribute Definitions

Brand
Brand:	Canon

Lens Specs
Lens Min. Focus Distance:	.92 ft.
Lens Min. Focus Distance: The shortest distance that a lens can focus. View All Attribute Definitions
Lens Filter Size:	77 mm
Lens Filter Size: The size of the filter that fits the lens. View All Attribute Definitions
Minimum Aperture:	22
Minimum Aperture: How wide a lens can be opened. View All Attribute Definitions
Elements / Groups:	9/12
Elements / Groups: The individual pieces of glass that form the overall optical construction. Most lenses have between four and eleven elements to bend the light rays to ensure a perfectly formed image appears on the light sensitive surface, such as a film or CCD. The elements are arranged in groups and may be seen in specification sheets as, for example, 6 elements in 4 groups. That configuration may have two single elements and the other four grouped in pairs. View All Attribute Definitions
Lens Hood:	EW-83E
Lens Hood: This is the type of lens hood. View All Attribute Definitions
Lens f/Stop Range:	4-22
Lens f/Stop Range: This is the minimum and maximum aperture of a lens. View All Attribute Definitions
Lens Type:	Wide Angle Zoom
Lens Type: This is the type of lens. View All Attribute Definitions
Focus Drive:	Ultrasonic
Focus Drive: The internal autofocus drive of a lens. View All Attribute Definitions
Angle of View (diagonal):	22.4 oz
Angle of View (diagonal): Area of a scene that a lens covers or sees. Determined by the focal length of the lens View All Attribute Definitions
Maximum Aperture:	17
Maximum Aperture: How wide a lens can be opened. View All Attribute Definitions
Focus Type:	Auto / Manual
Focus Type: The type of focus of the lens from full manual control to auto focus. View All Attribute Definitions
Mount Type:	Canon
Mount Type: This is the mount type for the lens to attach to the camera body. View All Attribute Definitions