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

SKU 8806A002
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Original price $692.00
Original price $692.00 - Original price $692.00
Original price $692.00
Current price $623.78
$623.78 - $623.78
Current price $623.78
  • 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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    Canon EF 17-40mm f/4L USM Lens

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    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


    Focal Length

    17 - 40mm
    Comparable APS-C 1.6x Focal Length: 27 - 64 mm


    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'



    Minimum Focus Distance

    11.02" (28 cm)



    Maximum Reproduction Ratio




    Diaphragm Blades



    Image Stabilization




    Tripod Collar



    Filter Thread

    Front:77 mm

    Dimensions (DxL)

    Approx. 3.29 x 3.81" (83.5 x 96.8 mm)


    1.05 lb (475 g)