The successor of Canon EF 100-400mm f4-5.6L IS lens is rumored to be announced with the Canon EOS 7D Mark II. The launch date would be in late summer or early fall 2013.
There are already several patents for this rumored lens, see below:
The price for EF 100-400mm f/4-5.6L IS II wouldn’t cheap, according to the new 80-400mm lens from Nikon.
via: CR
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