Originally Posted by Just1MoreDave
I have a couple. I just recently got the 24mm f2 and I have had a not-quite-right 105mm f2.8 macro. Both have Vivitar equivalents. I also have a couple of Vivitar-Kirons and one Panagor-Kiron. The 24mm has a reputation for oily aperture blades and I had to fix mine. Otherwise I think they're great. I might get a couple more.
funny but I just repaired a vivitar 24mmF2 made by kiron for the same reason