the optical rolls with a little flat.

only a few days of work, but it's a different world ... a little heavy perhaps, seeing it is not made for pictures where you would be surprised, but the quality is outstanding, even on a DX sensor.
easy handling, amazing results remains that it is folly financially ....
After a little more time, a little nuance, from time to time the mechanism becomes less fluid, in that 24 to 70, it gives the impression that it will seize up after a rather long use, sometimes I taking photos for almost two hours.