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  • #4394855
  • Manufacturer: Canon
  • UPC #013803028058
  • Model #EF 17-40mm f/4L USM
  • 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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    Detail Description
    Detailed Description
    (Manufacturer # EF 17-40mm f/4L USM )

    Main Unit Spec

    Focal Length & 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


    Max. Diameter x Length, Weight

    3.3" x 3.8", 1.1 lb. / 83.5 x 96.8mm, 500g

    Sample Image

    MTF Chart


    EF17-40mm F4L USM Instruction Manual



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