A reader sent me the raw files for his copy of the Sony 24-105 mm f/4 zoom on a Sony a7RIII.
Here’s a composite I generated in Lightroom and Photoshop, at 200% enlargement.
This lens appears to be well-constructed. There is a loss of contrast and some astigmatism in the corners and the right and left sides (I’m no lens expert; I’m using the word to mean different sharpness sagittally and tangentially). However, the lens behavior is quite symmetric.
Looks like a keeper to me.