The f/3.5 lens is reported to give a 180 degree maximum field of view. However, it is not stated whether this is true for Nikon or Canon – since they use different crop factors, they can’t have the same field of view with the same lens without further modification.
Anyway, those are the only two mounts that the lens will be available for, for now. The lens weighs 541 grams and focuses down to 15cm at its 6mm setting and 25cm when set to 11mm, so it’s a varifocal lens, i.e. you’ll have to refocus after zooming, and it’s manual focus only.