EF17-40mm f/4L USM

EF17-40mm f/4L USM

During interior photo sessions, it is often impossible to move far enough away from the subject. Such situations call for a high-performance zoom lens covering the range from ultra wide-angle 17mm to a standard 40mm angle of view. This configuration also makes it possible to vary the perspective to create unique photos of landscapes and other scenes. Aspherical lens elements of two types – one GMo element and two replica elements – combine with one Super UD lens element to effectively prevent aberrations, ensuring the sharp imaging performance that characterizes L-series lenses. Highly resistant to both dust and moisture, this lens also features a circular aperture for pleasing background blur effects.


  • EF17-40mm f/4L USM, 1/500sec., f/11
  • EF17-40mm f/4L USM
  • EF17-40mm f/4L USM
  • EF17-40mm f/4L USM


Angle of View
(horizontal, vertical, diagonal)
93°−49°20’/ 70°30’−34°/ 104°−57°30’
No. of Diaphragm Blades 7
Closest Focusing Distance 0.28m
Maximum Magnification 0.24x (at 40mm)
Water/dust Resistance Yes
Filter Size 77mm
Max. Diameter x Length Ø83.5 × 96.8mm
Weight 475g
Extension Tube EF12 II 0.83−0.32x
Extension Tube EF25 II 1.02−0.70x
Lens Cap E-77U / E-77II
Lens Hood EW-83E
Lens Pouch/Case LP1319

  • Super UD element
  • GMo aspherical lens
  • Replica aspherical lens
  • Lens Cap: E-77 II
  • Lens Hood: EW-83E