Not to be left behind by the likes of Nikon, Canon and Sony, it seems Leica is planning to release a new full-frame mirrorless camera of its own. Japanese rumor site Nokishita has published a set of leaked images and specs of the alleged Leica SL2, a followup to the full-frame mirrorless Leica SL (Typ 601). From an aesthetic perspective, there’s not much to comment on: the design has been rounded out a little bit, and the large unlabeled buttons…