What has me very disturbed unfortunately are out Franzen, bright areas can be seen in 28mm everywhere. This falls well eg a sheet of paper on a dark table. Here it seems as if the leaf would be blurred, even though it is not.
Whether I only have a "Monday lens" caught or not I can not say exactly, but there have been several complained about this problem.
So if you want to work primarily with 12mm lens this is very good.
If you helped this review I would appreciate confirmation of the designated button very.
Many Thanks