Opinions please. I'm considering using my 12-40 with Kenko Extension tubes and have ordered a couple to try out. But for a little more money I could get a 55mm Micro Nikkor and adaptor. I was trawling for the best adaptor and came across this........... In very early tests with old 4/3 lenses I did find that the very best Nikon lenses (like 55/2.8 macro) were more or less the same resolution as a kit lens with both at best aperture, I kind of lost interest in the Nikons after that as the hassle wasn't worth it to get the same performance as the kits. On here.......http://www.dpreview.com/forums/post/50779327 As there is no extra glass added in either solution I would have thought that the IQ was equal to the IQ of the master lens. Perhaps focusing is put off in some way or maybe lens misalignment comes into it, I have heard of some adaptors not focusing at infinity..? Legacy lens addicts educate me...please.