Well it is a massive lens, so I guess it must have a big image circle to allow for the movements and to avoid corner softness, time will tell if it is the best wide angle TS lens ever made for 35mm.
Since this is almost surely an adaptation of an existing MF lens design from their catalog, I wonder if anybody knows the equivalent MF lens and how it performs...
Their 50mm T/S was not nearly as good as its priced would indicate, although I hear the 90mm T/S is very good. I have high hopes for the 28mm, because I often find 24mm to be too wide. But I'll be waiting for reviews or a rental copy before I consider dropping that kinda of money on it.
It is certainly the most expensive one.
Actually I think the Hartblei 40mm is even more expensive.