Some of the folks present at the Cp+ show shared two insights on the new Sony 400mm f/2.8 FE GM lens
1) Autofocus:
The Sony will focus “way faster” than the Canon 400mm and Nikon 400m lens. The reason is the new hardware tech used by the lens (new actuators and servo).2) Lighter:
The new 400mm GM lens will be also lighter than the Canon/Nikon competition
No word on the possible pricing yet but the lens will be announced this summer and be available in September according to BHphoto.