Not the best macro lens, but the rendering is interesting
If you want less spherical aberration wide open at close-up distances, you can try an achromat lens and set the Voigtlander to infinity. The Marumi achromats work very well for that. Alternatively the 50/1.2 performs great at MFD one or two stops down.
Yes I know and I have now a leica that I don't really use. It was just a little joke since this lens is really not to be hazy wide open at mini focus