Courtesy to Steve at Teamwork Photo for providing the digital backs, and to Paula at Linhof Studio for providing the lenses - great dealers to offer a test drive!
This test was supposed to investigate the color cast and crosstalk issues of current Rodenstock wide angle lenses on the Sony CMOS sensor (IQ250, IQ150, Credo 50 etc), and to help predict / mimic whether these lenses can hold up value if Sony makes a 645 fullframe CMOS sensor (around 54 x 40mm in size).
ALPA 12 SWA
23HR with center filter
IQ260 (as a positive control)
One obvious flaw is that I forgot to test the horizontal shifts. The popular 32HR was not tested, because the center filter is too big to accommodate ordinary filter holder and we were not interested. Hopefully someone else would be able to contribute on the 32HR.
Below shows how the 23HR with center filter performs on IQ250 after LCC correction (with IQ260 as a positive control):
Below shows how the 40HR performs on IQ250 after LCC correction (with IQ260 as a positive control):
I have attached the LCC files of these 3 lenses (23HR /w CF, 35HR, 40HR) on the IQ250: https://www.dropbox.com/sh/ze3cx44vp...1ECfXWZFa?dl=0
a) The "pink-banded" Rodenstock lenses (e.g. 23HR and 35HR) may hold up better against the Sony CMOS sensors.
b) The "blue-banded" Rodenstock lenses (e.g. 40HR) may have slight desaturation of color after LCC correction if shifted to the extreme - see the blue sky.
c) It is very likely that the IQ250 has the microlens offset design (same as the Sony A7R) - see the sudden occurrence of color cast in the lower part of the IQ250 LCC shots when shifted to the extreme.