Contax 60mm Makro Planar on GFX 100
So far I like the non electronic adapted lenses on my mirrorless systems much more than the electronic.
One of my favorite adapted lenses on full frame is a Contax 60mm Makro Planar. I feel it is very underrated. Near zero CA, 1:1 macro, very nice focus. I was surprised to see how well it works on my gfx100. Here is a downsized image taken at the lens' sweet spot, 1:10 reproduction.
Here is a center crop, lightly sharpened.
And here is the upper right corner, slightly sharpened.
Not bad. I will post another at infinity when I get a chance as well as some from an Olympus 90mm f/2, 38mm f/2.8, and 20mm f/2.