That peculiar textured bokeh of a triplet, all rendered in an almost monochrome semi-abstract subject here, with a subtle 3-D effect.
Two weeks ago I made a comment about magnification and Junkyard sparkle suggested that I get some more extension tubes, so I ordered some. Today they arrived, all the way from Hong Kong in only two weeks! So obviously I had to try them right away.Thanks for the link.
Most of the discussion seemed to be based on modern lenses not old stuff like the Jupiter.
If I were serious about macro photography I could save up my pocket money and buy a macro lens for £300 or so. But where's the fun in that?
As you say, best to try for yourself so I've ordered more tubes, I'll report back when I get them.