I'm hoping to get some answers from the knowledgeable legacy lens owners here on the forum. Everyone keeps telling me about the Konica Hexanon 50mm f1.7 (AR-mount), apparently it's the best 50mm ever made? Any truth to this? Lastly, this is actually an important point. Would the Kenko DG extension tubes work if I mount them after the mount adapter? Would it be cheaper to find extension tubes in their native mounts?