This is a Zeiss product, no doubt. The engineering is superb, the diopters align like a dream, and the optics of course are bittingly clear and superbly corrected.
The diameter is generous. My only minor gripe is the lack of an eyelet, but maybe it was really never menat to be a field lens, really.
Pros: clarity, optics diameter, precision
Cons: price a bit stiff, but you get what you pay for; lacks eyelet
This review was written in the old system and had content requirements that are different than reviews written today.