Totally wild: MS Optical Super Triplet Perar 3.5/35. A lens produced in a very small series (only 200 pieces) for the Leica-M bayonet. The basis is a triplet - i.e. a three-lens - but designed with modern calculations and modern glass types. Of course, triplets have known problems - some show up in a softer drawing and lower line resolution, others in the rather meager light strength. Nevertheless, the little guy is pretty cool. Unfortunately, the edition is already completely sold out. For my M8 (and the NEX-3 with adapter) it became a C Biogon 2.8/35 from Zeiss for me. That is already a much more classic calculation and execution, also not so super light-strong, but nicely compact. And Zeiss-typical "chön charf". I admit, however, if Leica had a retractable Elmar 2.8/35 or 3.5/35 (i.e. new, not the old, known lens for screw Leicas - the old one has too many optical defects by today's standards), I could get weak (Elmare are four-lens, I already use a 2.8/50 and 4.0/90, both retractable, the 50 is a hybrid: a four-lens triplet, i.e. the last two lenses cemented).