Thanks Fons, I have the SLII with the normal focus ring. Usually I take HN-7 with stepdown ring as sun hood (or stepup with HN-24) in which case the cap is not needed. Flare can be annoying.
Wide open I like it too. It excels wide open in low light. When stopping down the lens gets very sharp, with a very high resolution, and indeed compares with the CV90/3.5 and with the 80/2.8. Bokeh compares with the older Nikkor 5.8cm 1.4 according to some reviewers.