Guy I understand the concerns however shooting IR is a little more forgiving. Base on previous experience with a Hartblie when I was shooting with a P45 I had no concerns on the IQ. My main thought is that the 45 is equal to 28mm on the 7R and that with shifts I'll be able to pick up wider (maybe not as wide as my 14). I'll also be able to put it on the DF so I get (I hope) the best of both worlds. While I see this sitting on the Sony most of the time it'll be nice to have it there "just in case". I've got the newer lens coming to me so later in Sept I'll be able to share.
The other rease is that I just returned the 7R to Life Pixel to be reconverted to Full Spectrum and I need to be able to find filters (82mm) to fit the lens. I could have easily gone with the Canon 24 however to the best of my knowledge there simply isn't an adaptor to fit MF - not that it would work all that well to begin with.
Okay off topic so back to the 17..
Oh thanks to your test images Sandy and I are now trying to figure out a time we can spend some quality time in Cave Creek.