The Canon EF 20-35mm f/3.5-4.5 USM lens is a highly portable lens with high optical performance and a light weight of 12 oz. (340g). A very practical ultra-wide-angle zoom. The large front lens group minimizes peripheral darkening, and the flare-blocking diaphragm minimizes flare. Also, with lens group 2 being the zoom group, distortion is corrected. (Canon)
The Canon EF 20-35mm f/3.5-4.5 USM is equivalent to a 32-56mm field of view on a APS-C sensor DSLR like the Canon 40D or Rebel XTi. [Read more…]