Offer available from June 5, 2020 to July 2, 2020.
Offers weather-resistant construction.
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. All of the "L" lenses deliver optical performance equal to similiar fixed focal length lenses, and the USM lenses do this with silent, high-speed focusing. Distortions and aberrations are remarkably small for a lens of such amazing capabilities.
Rear lens cap - Front lens cap
|Lens mount||Canon EF|
|Lens type||Zoom lens|
|Max Format size||35mm FF|
|Focal length||17–40 mm|
|Number of diaphragm blades||7|
|Special elements / coatings||Super Spectra coatings|
|Minimum focus||0.28 m (11.02″)|
|Full time manual||Yes|
|Weight||500 g (1.10 lb)|
|Diameter||84 mm (3.29″)|
|Length||97 mm (3.81″)|
|Zoom method||Rotary (internal)|
|Filter thread||77 mm|
|Materials||Metal barrel, metal mount|
|Hood product code||EW-83E|
|Optional accessories||Soft Case LP1319|