Updated on November 1, 2010 by Robert Redmond
Canon recently announced an update to two of their most coveted lenses, the EF 400mm f/2.8L USM and the universally praised EF 300mm f/2.8L USM. Both new versions wear the "II" designation and both have been updated significantly. Additionally Canon has updated their Extenders, both EF 1.4x and EF 2x to "III" designations. Canon has also announced that a new EF 500mm and EF 600mm are in development for 2011.