The HartBlei Cam (disclosure: we are dealers) allow the use of a 17mm on a P65+ (full frame 645) with a mm or two of movement. I've not personally used this combo (though I have used the HartBlei cam) and the LL review
says the corners are not great (not a shock given it's utterly extreme wideness)
17mm on a P65+ is the same as an 11mm lens on a FF dSLR with a small bit of room for movements (especially if your subject is not filling the frame in the horizontal direction).
That's the widest rectilinear lens I know of (probably isn't the widest in existence so please jump in if you know of wider).
Head of Technical Services, Capture Integration
Phase One, Leaf, Cambo, Canon, Apple, Profoto, Eizo & More
National: 877.217.9870 | Cell: 740.707.2183
Newsletter: Read Latest or Sign Up
RSS Feed: SubscribeBuy Capture One at 10% offPersonal Work