This test was done using my new filter holder and the Lee foundation kit with one slot. This is on the 17TSE on a 1DS-mk3.
Vigneting usually occurs on one corner, indicating something is off center.
In general. I can safely use 3 clicks down and 4 clicks up when in landscape mode and the Lee foundation kit is not rotated.
With the foundation kit rotated 45 degrees, I am limited to 1 click up or down.
With the camera in portrait mode, plus or minus 3 clicks is the limit without rotation.
I don’t use the polarizer often, so I will probably avoid shift when I am using it. This is the only time I will need 45 degrees of rotation.
As soon as I get some blue sky’s I will test the polarizer effect.
The next 4 images have the holder rotated 45 Deg to simulate polarizer adjustment.
The balance of images have the filter holder un-rotated