Hard to say if it is the real thing. It doesn’t look like any other Canon lens. The image showed up on Peter Norvig’s G+ profile. He writes:

For Canon fans, you might find this exciting.  A photographer was using this lens. I assert that the black stripes of the focus and zoom rings are the wrong width and placement to be either the 70-200 or the 100-400; therefore I speculate this is a prototype of the long-rumored 100-400 II.

Any ideas…?

[via CR]

 

It appears as if Canon might soon announce a new EF 100-400mm lens. The production of the EF 100-400mm f/4.5-5.6L IS may be “coming to an end soon”. The new 100-400mm should go into production at the end of 2013 or beginning of 2014. The rumor also suggests that Canon will not starting production of the new 100-400mm until the production figures for the EF 200-400 f/4L IS 1.4x (Amazon | Adorama | B&H) are not in line with demand.

[via CR]