
Canon has finally announced the Canon EF 500mm f/4 L IS II USM and Canon EF 600mm f/4 L IS II USM will be available in May 2012.
These telephoto lens are the successors to Canon EF 500mm f/4 IS USM and Canon EF 600mm f/4 L IS USM. Both these lens were introduced in 1999.
The prototypes of these new lenses was shown at Photokina in Cologne, Germany from September 21 to 26, 2010.


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