Thank you for comments next step - find correct delution / timing for stand development. Looking at my first "experient" I think I will try something like r09 1:200 / 60 minutes.
Have to add one thing.. Picture were Taken with my now-favorite Mamiya ZE. Those little cameras the same as entire E series mamiya lenses are very underestimated. They are pretty rare to find but go for close to nothing.. 50mm f2 is really sharp and makes amazing foggy bokeh on full open.