exkeks said:
I think, it’s quite the opposite. The fact that Canon didn’t bother to produce a newly designed 70-200/2.8 aside from some cosmetical changes, is a sign that they do not aim at current owners of the 70-200/2.8II IS wanting to upgrade. Because -perhaps- there will be a new EF-# 70-200/2.8 coming soon?
The new lenses employ several new features. Canon communicated
only the coating and improved sealing on the f2.8 lens.
What they didn't tell openly is that these lenses are now assembled
on their new robotics assembly line. This cuts down production cost
per piece and vastly reduces tolerances and variations per piece.
All the lenses designed over the last two years now carry their
correction data onboard, eliminating the need to build firmware
updates for cameras only to support those lenses.
The biggest easter egg though is very likely that those lenses also
sport the new communication protocol, speeding up data transfer
anywhere from estimated factor 10~100.
This has enormous effect on AF speed, smoothness (video!) and
precision, and it also aids lens stabilization combined with digital
stabilization in camera.
I am convinced that the new cameras will have EF+ mount,
the plus referring to correction data and faster protocol.
support those lenses.