I've been slowly selling off lenses that I simply don't use and, out of my Minolta lens collection, I have one lens that I think is outstanding compared to what I think of the others. The lenses range from 35mm to 135mm in the MC/MD range and all are in pretty good condition, but I don't think much of the results when it comes to using them on the E-M1 (could be the fact that I don't find manual focus easy anymore). The one exception is the MD 50mm f3.5 Macro with 1:1 adapter, which I'd only use on a tripod and do things slowly. The lens looks like it just came out of the factory and really is fantastic optically, but the problem is that I also have the Olympus 80mm f4 and corresponding 25mm adapter, which is also fantastic optically. So I've been considering selling the Minolta lens, but looking at some of the eBay options, there appear to be two types available. One version has the lens information inside the front element, the other (like mine) has it engraved on the outside of the barrel. Even a Google search failed to reveal why there are differences and the Rokkor Files didn't mention this either. There's a thread on this forum about the lens, but it doesn't specify which model is being used. Does anyone know what the differences might be?