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. Lens Construction 12 elements in 9 group. Diagonal Angle of
View 104° - 57° 30 feet.