I am testing an old Russian (Soviet) MTO 500mm f/8 mirror tele lens
(borrowed from a friend).
It is heavy, its minimal focusing distance is 4 meters...
This time I missed my object but I am happy to see small rings around flower petals just outside the DOF.
Things in the background are not so pretty though. They look more like unwanted blotches. But they are not. There were people in their bright, summer clothes standing there :)

BTW the owner of the lens tells me that this type of bokeh is commonly named donut/doughnut-shaped.
I am going to use the term from now :)

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Revueflex SD1 + MTO 500mm f/8 + Kodak T-Max 400 + Kodak HC-110 (Dil.B)