Hi, So I picked up a Vivitar 300mm/5.5 lens with a Minolta mount. I'm sure it is not incredible or anything, but I'd like to try something with a bit longer reach than I currently have and thought it might be fun. Doing a little more research, I learned that the lens uses what Vivitar called a "T4" adapter, which allowed these lenses to work with most of the popular brands of the day (it's a pretty interesting and clever mechanism that puts it together). It does not fit on my Minolta adapter. This adapter works with 3 other minolta-formatted lenses I've had. The lens fits onto my old Minolta camera and the cheapo Minolta 2x Televonverter that came with the lens (the teleconverter also fits on my adapter). So it appears that both the lens and adapter are what I thought they were and have otherwise operated perfectly well during their lives. Looking at the parts, it seems that the "teeth" (is that what you call them?) on the lens and adapter don't exactly match up. There is a probably about an eighth of an inch of overlap on one of them, preventing a fit. It seems to me that both Vivitar and the nameless Chinese company that made my adapter were slightly out of "spec" in opposite directions from each other, leaving them both well within range of working with original Minolta products but creating the problem with each other. So what would be the best solution for this? Blindly trying to get another Minolta adapter to see if it works? Filing down either the adapter or lens? Forgetting about it? I'm assuming there's no such thing as a T4-Micro 4/3 adapter. Sorry for the lengthy post here. I've been waiting for this to arrive for over a week and was pretty disappointed it didn't just fit like every other lens I've tried.