I had to do a double-take on that.
It's a Distagon?
Distagons (and Flektogons) are Retrofocus, wide-angle lenses, with focal lengths less than their flange distance.
ie, 21mm and 35mm Distagons on SLRs with ~45mm flange distance.
or 35/40/50mm distagons/flektogons on Medium Format with ~80mm flange distance.
So what are they doing here? Creating a Retrofocus Distagon with a longer focal length and flange distance and possibly bigger image circle, adding in a bit of space to the mount (effectively they're just making an MF lens on an SLR via adapter).
That would explain the 82mm filter (my 50mm 6x6 Flektogon takes 86mm filters), creating a larger image circle and then projecting only to 35mm FF would give better border performance (IQ/vignetting) too.
It's a very good idea, a lot of people get very good images using 35/40/50mm Distagons adapted from hasselblad/contax 645.
But damn, that's going to be huge and expensive if that's really what they're doing...