I'm still slowing working through my lenses with the A7. I went on a walk in the fresh snow with just the 135mm attached. I think I got a few that are fairly nice, if only to show what this lens can do on a FF sensor. Caveat: my copy of this lens is recovering from drastic surgery to remove fungus. There's still marks on the glass that couldn't be removed. When I got it, the lens looked like it had been dropped in a lake. The inside of the mount was filled with sand. I had to completely disassemble it, which was a lot of fun--and certainly easier than repairing the FD 85mm f/1.2L. So if there are any flaws, that would be a good place to attribute them. As for as I can tell, the IQ isn't affected at all. There's a good amount of longitudinal CA, which I fixed in Lightroom, but that was already there.