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

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

Manufacturer: Canon U.S.A., Inc.

Item #: CAN-EF17404L   •   MFG #: CAN-EF17404L


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An 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.

  • Features

    • 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 - 77mm
      Max. Diameter x Length, Weight - 3.3" x 3.8", 1.1 lb. / 83.5 x 96.8mm, 500g


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