Does anyone know if lenses such as Schneider's 35mm digitar XL and 47mm digitar XL cause color cast on film? Or is it only a digital-sensor phenomenon? I have both of these lenses on an Arca Swiss 69 FC. I often shoot film for personal work, and I'd love to use them occasionally with film, especially for shift/rise/fall movements. I can't test this for myself, as I currently don't have a film back that will mount on to the camera.
In principle, there is no Color Cast as we know it from the sensel masking and cross-talk artifacts and Bayer Demosaicing in single shot sensors. Depending on the filmstock, there might be a tiny bit of internal scatter in the color layers though.
The main benefit of still shooting an occasional LCC frame, even with film, is that it also allows to calibrate for lens vignetting and light fall-off, including scanner effects. Of course that requires taking a film frame of a uniformly lit surface and/or using an LCC diffusor. Whether the cost delivers enough of a benefit is up to the user, but it would allow an almost perfect flat illumination whith Tilt/Shift images, as long as the scans are made of exactly the same area as the film with an actual image.
Again, more useful
with digital captures, but not entirely useless with film (although with fewer benefits).