I need your help, as I'm not very familiar with some aspects I encountered recently.
I'm big fan of large format look. So I started to to some stitching with Toyo 45G. Great thing about this camera is that rear part of camera can be moved around and combined with adapter horizontal movement it's possible to get 166mm x 166mm coverage (235 image circle of 90sw f8). I don't need to tell you that moving rear part of view camera is different from 35mm panorama with PTGui It's basically a dream came true of huge 166x166 digital sensor.
The biggest problem was internal shading I experienced with out of box chinese adapter. Still, considering incredible movements and very close lens to sensor position results were usable and had unique look. Please check first picture and heavy purple fringe on the right side.
I modified chinese adapter and now nothing is blocking light from the lens. Vignette is reduced, but still present (lens property @f11?). What bothers me is still present color cast. Please check 3nd picture. This makes me thinking me that it can be the problem with light hitting the sensor at extreme angle. There is no light leak. Tested with camera totally covered. Turned lens 90 degrees, same color cast.
To give you idea about the angle there is 4rd pic.
What do you think? Normal behavior? Or something is wrong?