Canon has officially announced the new 200-400mm f4L IS lens with a built in 1.4x extender and already there is a five page review with Dxomark test results included published at Le Monde de la Photo. Here it is, page #1 and page #2 and page #3 and page #4 and page #5.
The lens is available for pre-order for $12,000 at Adorama.
As it is often the case, new camera announcements, especially of the interchangeable lens variety, means that the number of reviews posted goes down since most reviews don't want their reviews buried by the new-camera-news.
But there was one new lens review today, coincidentally also of the Olympus variety, the 17mm f1.8 micro four thirds lens reviewed at Digital Camera Review.