Mounted lens on a cheap Z adapter and took a test series, noticing the lens did not reach infinity and was a tad softer on the right side. Just a little bit of both. Will have to buy the Rayqual as George recommends.
Sample at 1.2 with cheap adapter, full sizes in Flickr
Placed lens on FTZ and it did reach infinity just fine, plus sharpness became even across the frame. This is actually quite good performance at 1.2 by any standard. (of mine )
