Description :

A new and affordable L-series ultra-wide-angle zoom lens thats 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 Canons 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.

About half the price of the 16-35 f/2.8 lens, this L-series lens has an entirely new optical design with three Aspherical elements and a Super UD-glass element.

The combination provides superb contrast and sharpness, even at the widest settings.

Its ideal for both film and digital SLRs, and features the same weather-resistant design, rear gel filter holder, and high-speed Ultrasonic Motor as the EF 16-35mm lens.

Features :

- EF mount, ultra-wide zoom lens.
- Super Ultra-low Dispersion glass, inner focusing, aspherical lens, full-time manual focus
- 17-40mm focal length.
- f/4 constant maximum aperture.
- Ring-type Ultra Sonic Motor (USM).

Specifications :

Focal Length and Maximum Aperture 17 - 40mm, 1:4.
Lens Construction 12 elements in 9 groups.
Diagonal Angle of View 104° - 57° 30.
Focus Adjustment Inner focusing system with USM.
Closest Focusing Distance 0.28m / 0.9 ft.
Zoom System Rotating type.
Filter Size 77mm.
Max. Diameter x Length 83.5 x 96.8mm.
Weight 500g.

Contents in box :

- 1 EF 17-40mm f/4L USM Lens.
- 1 front cap.
- 1 rear cap.
- 1 user manual.

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