The OKS1-80-1 lens is great piece of glass itself. Shallow depth of field, nice bokeh, soft image and moderate focal length make it one of the best choice for a portrait photographer or video operator who wants to add cine-like impression to his footage.
But this particular lens is very rare factory-made macro version. It has usual distance scale of the focus ring (1m to infinity). And it has another control ring in the front part of the assembly - marked from 1m to 0.35m. If my assumption is correct, and distances are marked to film plane, that means that ypu can draw the front part of the lens as close to a subject as about 12cm!
The lens has PSK mount currently, and needs to be converted to something more widely used (Arri PL or OCT-19). I'll try to sell it as is first. If it will not sell, I'll convert it to PL later, but this will add to the lens price, of course.