I read a reviewer wrote (some time ago and without any pictures)
My images - this example is 100% crop of 4 black dots (0.5 mm diameter) from the center (no CA), then from the left upper corner of crop sensor (or about middle frame of the full sensor) and the last is the left upper corner of the full frame - shows clearly visible purple and green/cyan aberrations away from the center."There are no lateral color fringes, even without a lens profile on full frame."
I was looking for some way to see them more clearly and defined and at the end I applied "trace contour" and "find edges" in Photoshop. Also tried the channels... Anybody knows better way to isolate and emphasizes them?
I think somebody mentioned somewhere that if pictures are taken with different light (only red, then green, and then blue) these CA can be measured or something like that?