Reader Mark M writes:
...here is a JPEG of a file I shot of an evenly illuminated foam core. Focus at infinity, f8.0, nothing in LR beyond exporting as jpg.
You can clearly see a blue/magenta bias on the right, and a yellow bias in the center and left. And more light fall-off on the left than the right.
DIGLLOYD: a lens that is not optically quite right can have asymmetry sharpness, brightness and color rendition in the outer zones and corners. A misaligned lens flange can also cause subtle issues like this.
I looked into this with my own Voigtlander FE 50mm f/2 APO-Lanthar Aspherical at f/2 through f/8, and it has no off-center tint shift, though it has a slight shift to blue into the corners as is seen with many lenses.
Results are shown from f/2 through f/8 along with exact vignetting for f/2 and f/8
See also color balance by aperture.
The about $1049 Voigtlander FE 50mm f/2 APO-Lanthar Aspherical is one of the sharpest highest-performing lenses I have ever tested and is an absolute gem on Sony mirrorless, compact and with the best haptics available. It is worth twice the price.