Lensrentals has loaned me a Fujifilm 30 mm f/5.6 tilt/shift (T/S) lens to test. I mounted it on a GFX 100 II, focused it at infinity, aimed it at a white wall, and made four images at each f-stop from 5.6 through 11, rotating the camera 90 degrees around the lens axis. I brought the images into Lightroom, white balanced in the center, developed them with lens profile corrections turned off, exported them to Ps, and, for each f-stop, converted the images to a stack, turned it into a smart object, set the blend mode to mean, and flattened the image.
I did the first set with no shift.
The is good performance, but such low illumination falloff is not difficult to achieve with an f/5.6 lens.
Making things harder, I set the lens to maximum shift.
Now we’re seeing more falloff, but very little color shift. I consider this good performance.
[Added later on 11/10]
There have been reports of weird color shifts in the above images. I don’t see them, but it may have to do with the JPEG compression employed when I exported the files from Lightroom, and further compression by the blog software. Here are a couple of screen shots of the 15mm shifted f/5.6 image, with CIEL*a*b* values reported at the points of the red crosses.
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