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CANON EF 17-40 F4 L USM

Product ID: 1138

EAN: 4960999189949



  • EF Mounting Lens / Full Frame Format
  • Opening range: f / 4 to f / 22
  • A Super Ultra-Low dispersion element
  • Three aspherical elements
  • Super Spectra Coating
  • Ultrasonic ring motor AF system
  • Climate-sealed construction
  • 7-leaf rounded diaphragm

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

Encompassing a versatile wide-angle range, the EF 17-40mm f / 4L USM lens is a CanonZoom L Series with a constant maximum f / 4 aperture along with a sophisticated optical design and durable construction. a Super UD element is presented along with three aspherical elements, which help reduce chromatic and spherical aberrations for great color sharpness, clarity and precision. a Super Spectra coating has also been applied to suppress reflections and ghost images for better contrast in difficult lighting conditions. a Super Spectra coating has also been applied to suppress reflections and ghost images for better contrast in difficult lighting conditions. a Super Spectra coating has also been applied to suppress reflections and ghost images for better contrast in difficult lighting conditions.

The wide-angle zoom is designed for Canon EF full-frame mount DSLRs, however, it can also be used with APS-C models where it offers an equivalent focal length range of 27.2-64 mm.

Maximum aperture f / 4 constant maintains uniform illumination throughout the zoom range.

A Super Ultra-Low Disper® glass element

sion significantly reduces color fringes and chromatic aberrations for greater color clarity and fidelity.

Three aspherical elements minimize spherical aberrations and distortions for improved sharpness and accurate representation.

Super Spectra coating has been applied to individual elements to minimize ghosting and glare for greater contrast and color neutrality when working in bright lighting conditions.

An ultrasonic ring motor (USM), together with an internal focusing system, is used to provide fast, accurate and quiet autofocus performance, as well as full-time manual focus override.

The seven-leaf rounded diaphragm contributes to a pleasant blurred quality that benefits from the use of shallow depth of field and selective focusing techniques.

As a member of the esteemed L series, this lens is sealed against dust and moisture to work in inclement environmental conditions.

In addition to the 77mm front filter ring, this lens also has a rear filter holder for up to three cut gel filters.

 
SPECS
  • Technical characteristics
  • Lens mountCanon EF
  • Compatible with sensor typeAPS-C, full format
  • Type of constructionadjustable zoom
  • Image Stabilizerno
  • AF motorultrasonic motor (USM)
  • Optical construction (groups/elements)9/12
  • Number of diaphragm blades7
  • SwitchAF/MF
  • Outdoor functionweather-resistant
  • Target propertiesintegrated approach
  • Optics
  • Luminous intensity4
  • Focal Length17 - 40 mm
  • Zoom factor2,4 x
  • Focusautofocus, manual focus
  • Circular Diaphragmno
  • Apochromaticno
  • Reduced image circleno
  • Maximum magnification1:4,1
  • Minimum Focusing Distance28 cm
  • Equivalent focal length in 35 mm28 - 70 mm
  • Lens typeUD Lenses, Aspherical Lenses
  • Minimum opening22
  • Maximum opening4
  • Measurements
  • Filter diameter77 mm
  • Length97 mm
  • Target diameter83,5
  • Weight500 g
  • Other features
  • Type of productStandard zoom lens, Wide-angle zoom lens
  • SeriesCanon L
  • Scope of applicationlandscape photography, action photography, close-up photography
  • Article includedlens cap, lens cap
  • Colorblack
 
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Opiniones(1)
Calidad
Mªdolores O. on 15/09/2016 Mi primer L. Tal como lo esperaba. Perfectamente
 
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