Canon EF 17-40mm f/4L USM Lens

Name: Canon EF 17-40mm f/4L USM Lens
Brand: Canon
SKU: 8806A002
Price: 623.22 USD
Availability: InStock

SKU 8806A002

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$692.00

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$692.00

$623.22

$623.22 - $623.22

$623.22

EF Mount L-Series Lens

Aperture Range: f/4-22

Three Aspherical Elements, One Super UD

Ultrasonic Autofocus Motor

Manual Focus Override

Water and Dust Resistant

Internal Zooming and Focusing

Truly Circular Diaphragm

77mm Front Filter Diameter

Rear Holder for Three Gel Filters

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Features

TheEF 17-40mm f/4L USM LensfromCanonis a high quality "L" series wide angle zoom lens for full frame and APS-C size DSLR cameras. It combines one high-precision molded glass asphericalelement and two replica aspherical lenses to achieve the extended zoom range, while also correcting for common aberrations that arise during zooming. A Super UD (Ultra-low Dispersion) glass element minimizes the chromatic aberration of magnification which tends to occur with wide-angle lenses, to help eliminate color bleed along the edges of the subject and achieve high image contrast and resolution.

Thelens' minimum focusing distance is just 11" (28cm) throughout its entire range of focal lengths, which makes it very useful for close-up work. All of the focusing and zooming action is done internally, with no changesin the size of the lens. Its ultrasonic autofocus motor enables smooth and silent autofocus action and manual focus override in One Shot AF mode allows precise manual focusing without switching into MF mode.

It only uses lead-free optics to help the environment, and features a circular diaphragm for improved background blur. The housing is water and dust resistant to help ensure reliable performance for both professionals and enthusiasts. Like many "L" lenses, it uses 77mm filters, but also has a rear gelatin filter slot behind the lens mount that can hold three gel filters.

This lens is a Canon 'EF' series lens, indicating it is for use with full-frame cameras. However, it also works with APS-C format DSLRs and offersa 35mm focal length equivalence of 27-64mm, making it an ideal medium-aperture standard zoom lens.

A super wide-angle zoom lens for full-frame DSLR and 35mm film cameras that offers a 27-64mm focal length equivalent when used on APS-c size sensors.

Uses three aspherical lens elements and Canon Super UD ultra-low dispersion glass for reduced aberrations and overall sharp, high contrast imaging

An ultrasonic autofocus motor provides fast, smooth and quiet AF action, particularly important when shooting video.

Manual focus override enables precise manual focusing even when in One Shot AF mode.

Internal zooming and focusing systems

As a Canon "L" series lens it provides professional levels of moisture and dust resistance.

Circular aperture diaphragm for better, more natural looking background blurring

Accepts 77mm filters, as well as gelatin filters at the rear of the lens.

Item Includes

Canon EF 17-40mm f/4L USM Lens

E-77 II 77mm Lens Cap
Lens Dust Cap E (Rear)
EW-83E Lens Hood
Lens Case LP1319
Limited 1-Year Warranty

Item Includes

New Page 4

Performance
Focal Length	17 - 40mm Comparable APS-C 1.6x Focal Length: 27 - 64 mm
Aperture	Maximum: f/4 Minimum: f/22
Camera Mount Type	Canon EF
Format Compatibility	35mm Film / Full-Frame Digital Sensor Canon (APS-C)
Angle of View	104 - 57 30'
Tilt/Shift	None
Minimum Focus Distance	11.02" (28 cm)
Magnification	0.24x
Maximum Reproduction Ratio	1:4
Elements/Groups	12/9
Diaphragm Blades	7

Features
Image Stabilization	No
Autofocus	Yes
Tripod Collar	No

Physical
Filter Thread	Front:77 mm Rear:
Dimensions (DxL)	Approx. 3.29 x 3.81" (83.5 x 96.8 mm)
Weight	1.05 lb (475 g)

Canon EF 17-40mm f/4L USM Lens