Review: "The Canon EF 17-40mm f/4.0L was announced back in February 2003 as a lightweight ultra wide-angle zoom and has since become a bit of a classic lens for owners of Canon EOS digital and film SLRs.Its ultra-wide focal range delivers spectacular coverage on film or full-frame digital SLRs, although it's sufficiently wide to also be considered as a general-purpose zoom on APS-C bodies like the EOS 30D and 400D / XTi.
The EF 17-40mm f/4.0L is one of the best lenses in Canon's range. It brings you a taste of the truly exotic with ultra-wide coverage, while boasting "L" quality all at a surprisingly affordable price. Sure it ain't exactly cheap, but it's considerably more affordable than the EF 24-105mm f/4.0L and almost half the price of the EF 16-35mm f/2.8L."
