Hi All,
I'm late to this thread, brand new member to the forum.
Regarding the Hartblei 45mm super rotator, I purchased a new one eight years ago, and have used it on many different cameras. Mechanically it is ingeniously designed, and solid as a tank. Optically it is
not a great performer. Lots of CA, curved plane of focus, soft in one corner. Perhaps the new ones are better, but make double sure it is the newer design. Many of the 45mm super rotators on ebay claim to be the digital version, but the lens groups appear to be exactly the same as the old ones. The only really sharp ones are those where Zeiss provided the glass, and hartblei the body. These sell upwards of $4K if you can find them.
I have had much better luck with a Zörkendörfer or Zoerk modified Mamiya 50mm shift lens (no tilt) made to fit Hasselblad. Every now and then you can find them on eBay. I recently purchased two copies for around $600 each, one went to a colleague. Very sharp, low CA mild barrel distortion easily corrected in ACR.
Agree with one of the posts mentioning use of a 45mm pentax 67 lens using a zoerk pro shift adapter. This is a pricey item somewhere around USD 2500 last time I checked.
Z
So, for the time being, the 50mm Mamiya/Hassy shift is it.
If tilt with longer focal lengths, or/and macro is your thing, check out Zork's multi focus system which employs enlarging lenses. It can also be used in conjunction with the Pro shift adapter.