Canon EF 17-40mm f/4L USM
A new and 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.
Technical details
- Colour of product
- Black
- Weight
- 500g
- Camera brands compatibility
- Canon
Lens system
- Component for
- SLR
- Lens structure (elements/groups)
- 12/9
- Filter size
- 8.35 cm
- Lens type
- Wide zoom
- Focal length range (f-f)
- 17 - 40 mm
- Minimum aperture number
- 4
- Diagonal angle of view (max)
- 104°
- Diagonal angle of view (min)
- 30°
Focusing
- Focus adjustment
- Auto/Manual
- Closest focusing distance
- 0.28m
Weight & dimensions
- Diameter
- 7.7 cm
- Length
- 9.68 cm
