Is it a CV-125mm APO killer? Not for very close work, but for all other work, yes it may well be, perhaps not a "killer," but a peer. The new Zeiss 135mm APO seems to have broken that spell and immediately gained access to my inner sanctum of sacred lenses just because they took the time to correct it.
The lens is big, heavy, and a tiny bit crude-looking IMO, and those are not endearing qualities. However, forget about all of that, because the lens is sharp and actually APO, at least enough for my taste.
One serious downside is that the close focus is something like 2.6 feet, which is not close at all. However, slap it on the Nikon D7100 and I am right back in the ballpark for macro use, although I will have to get used to being so far back from my subject, but that should not matter, right?
It compares well to the CV-125 APO-Lanthar, plus it works electronically with the Nikons. It is, of course, manual focus. I have a lot more experimenting to do, and I am busy selling a company, so I don't have as much time for this as I would like.
Below are two stacks (Zerene) done on the D7100, the first is the Zeiss APO and the second the Voigtlander CV-125 APO. I tried to do single shots (no stacking), but there are too many variables for me. Stacking kind of levels the tables IMO. At least that is how I like to test them since that is how I will be using them.
I see differences, but nothing too major. Consider that you can purchase the Zeiss APO for less than at CV-125mm, so that is something.
Edited by Michael Erlewine, 19 June 2013 - 20:46 .