jcolwell Offline Upload & Sell: On
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Long story short, I'd return it.
I've used many adapted Contax lenses on Canon EOS cameras, and infinity focus has been accurate at the focus ring hard stop, with decent adapters. OTOH, I've had the infinity stop adjusted on four or five Pentax and Mamiya 645 lenses, not to mention Samyang/Rokinon.
Asymmetric sharpness is often a sign of adapter problems, but Fotodiox Pro should be OK (I have many) and Novoflex is about as good as it gets. I prefer using Leitax mounts when available (including on a CZ 35-70/3.4), but Novoflex has a sterling reputation for making precision adapters (which are also very expensive).
In your sample images, the lower left foreground is certainly less sharp, but the details on the more-distant roof of the building seem sharper in the lower left image (compare short horizontal structures on either side of what appears to be solar panels). Something's not right.
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