Canon EF 17-40mm USM f4 lens

Product Code. 131016

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Details for Canon EF 17-40mm USM f4 lens

Ultra-wide high performance zoom lens offering excellent image quality. Dust-proof and moisture-proof construction. Rear focusing and ring USM for silence and high-speed AF. 2 UD and 3 types of aspherical elements reducing chromatic aberration of magnification and providing superb image quality. Non-rotating front element during focus.


  • Focal Length & Max. Aperture: 17-40mm 1:4
  • Filter Diameter: 77mm
  • Magnification with Extension Tube EF12: 0.83x - 0.32x
  • Magnification with Extension Tube EF25: 1.02x - 0.70x
  • Diagonal Angle of View: 104° - 57° (43.2mm)
  • Horizontal Angle of View: 93° - 49° (36mm)
  • Lens construction: 12 elements in 9 groups
  • Minimum aperture: f/22
  • No. of aperture blades: 7 (circular aperture)
  • Closest focusing distance (m): 0.28m
  • Focus drive: Ultrasonic
  • Dimensions: 83.5mm dia. x 96.8mm
  • Weight: 475g