yes and no. When you double them as some have (ala 20x macro) you get some real abberations. But if you get the distances just right they can show some great footage. Some will disagree. Now my Ed35 v1 and v1.5 used asian macros and although there is some slight CA in certain shots it is very minimal and the average viewer does not notice them. I had to point them out to people and even then they were like "umm, ok?".
But if WK is about to send you a achromat take up that offer and compare them.
Hey Ed....I'm one who disagrees. I used the Asian macro to build the basics of my adapter knowing full well that the optics are sub par for sure. When it comes to glass, you get what you pay for....it's that simple.
Once I understood what I was doing with building my adapter, I purchased the $200 CO+7 and then simply lengthened my adapter by 2" so I could pull focus. The difference was huge and I would not advise anyone to build a permanent adapter using an Asian Macro.
You're using a Leica lens on your DVX..... for good reason....so why put cheap optics in front of it?
Someone who wants an adapter with a short barrel length. It's total overkill.
Like Marlene said, you can use a much lower magnification, such as a +7, and get great results. Granted, she is using a Century Optics lens which is high precision glass, so that certainly helps as well. However, I used a Zeiss lens which was rated at about +5.6. As that was not quite powerful enough I used a small +2 Asian macro to boost the magnification. I don't see any chromatic aberration, but that's mainly because of the Zeiss achromat. If you can use an achromat, do it. The Asian macros may work if you're just experimenting to get the concept down, but I'd warn against them for a high quality adapter.