Quote Originally Posted by wickerprints
And since axial CA can be present even at
the point of sharpest focus, I think it is reasonable to conclude that
misfocus is not the reason for its appearance here.

I think this makes sense, but in some sense does not contradict what Trondster was saying. Some colors *are* out of focus, not due to operator error but because
the focal plane is not flat in all colors.


Quote Originally Posted by neuroanatomist
My Zeiss lenses are certainly excellent. But then, mine are microscope objective lenses and those are made at the Zeiss production facility in Jena, Germany.

Mine is an eyepiece, also Zeiss Jena. (Actually, I don't know where it is made, but it's branded "Zeiss Jena"). It is a tiny eyepiece with a narrow field of view. And it is awesome, really.


Never been tempted by Zeiss camera lenses, though. (Okay, well... not much [])