The EF 400mm f/4 DO IS USM lens was announced in 2000. That is a long time we haven’t see the updates on this lens, today Canon published a new patent on EF 400mm f/4 DO IS II USM lens. See the detail below:
Rumors from CR that Canon is going to hold a new press event on April 23, 2013. At this announcement, Canon will announce a new product yet not confirmed, the most likely product would be Canon EOS 70D.
We just got the full specs list of leaked Canon EOS 70D. Compared to the 60D, there seems a lot of improvements. For example: The new 18MP Sensor, Digic 6, 25 AF Points, 7.3 fps, Supports USB 3.0 and GPS, and 100g lighter than the 60D.