Panasonic introduced a new 100-400mm f4-f6.3 lens yesterday. This lens can be attached to any m43 mount camera body from either Panasonic or Olympus and provides a 200-800mm field of view. One of the interesting features is that it weighs only 985g, the lightest tele-zoom currently available from anyone.
http://www.dpreview.com/news/2683456245 ... ens-lineup
