Upload & Sell: On
Thanks for the comments, guys. So far I've purchased Nikon 180/2.8 ED AI-s, Leica 180/3.4 APO-Telyt-R, and Tamron SP180/2.5 LD-IF.
Since the Nikon is cheap and common, I've bought several and will screen for bad samples. Doubt I'll be able to do this with any of the other competitors, but we'll see.
Leica 180mm f/2.8 APO-Elmarit-R, 180mm f/2 APO-Summicron-R If you were in Germany, I could lend you my 180/2 for the test.
I've always wanted to do BMW European Delivery (factory pick-up). Add in the chance to use a 180/2 and I might have to finally do it!
The Leica 180mm f/2.8 II is also a good lens, but maybe not worth buying just for a test.
There's enough R demand I'm sure I could resell it after the test. I may go for it.
Zeiss Sonnar 180mm F/4 ZV - as long as you're doing MF lenses.
I thought the ZV series were just rehousings of the CFi/CFE lenses (into "classic" silver like the C lenses), so the Zeiss 180/4 ZV was the same lens as the Hasselblad 180/4 I mentioned in the OP. Is that not right?