I’ve added numerous examples to Zeiss ZF/ZE Lenses for the Zeiss ZE 18/3.5 Distagon for Canon EOS, including a close-up page, a night-shots page, and various other examples. (Links for subscribers only).
I am very favorably impressed with the ZE 18/3.5 Distagon. Field shooting for all those examples revealed interesting field curvature which is subtle enough to miss, but strong enough to affect results, behavior which when understood will help anyone in improving their results with the 18/3.5 Distagon.
Canon users will find the 18/3.5 Distagon a great option, provided that one is willing to embrace an ultra-wide lens and focus by eye manually.