Wow they want $9000 for that old film-era 70mm Rodenstock?!!
it's one of the better film era Roddies, but it's still a very old design, not up to modern digital standards, let alone 150mp.
(Yes I have owned and used, 50, 60, 70,and 90mm Rod's)
Phase really should have had the clout to commission a special new Rodenstock lens.
And why not the 50mm f4? That's one of Rodenstock's best digital lenses.
I can attest that the 70mm Rode HR (Blue ring) is an excellent lens when used with the IQ4-150 after using it for the past 8 months. Some of the "legacy" lenses are quite happy with the IQ4 in terms of shifting and resolving. The 90mm Rode HR (Blue or Magenta ring as its the exact same lens according to Rodenstock) is also an excellent lens that I have tested extensively with the IQ4-150.
Consider that the IQ4 has a BSI sensor, which is far more forgiving compared to previous CMOS and CCD sensors that were FSI when shifting, and therefore there is less demands made of the lens in terms of color fringing (avoidance of such optically). Also consider that the 90mm Rode HR does NOT require a rear extension, is 30% smaller and lighter when compared to the new 90mm HR-SW and a pristine example is 1/4 the cost...assuming you can find one...I just sold an extra copy I had for $1,800. (unmounted). Point in case just because a view lens is not the latests design does not mean it is not a fantastic lens with the newest DB's.
R