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.
|Function / Efficiency|
|Min. Focus Distance||28cm / 0.9 ft|
|Max / Min Aperture||f4 / f22|
|Angle of View||104° - 57° 30'|
|Lens Construction||12 elements in 9 groups|
|Dimensions||83.5 x 96.8mm / 3.3 x 3.8 inch (DIA x L)|
|Weight||500g / 1.1 lb.|