In my desire to replicate the look of early Leica photographs, for my Leica Standard I foolishly bought an uncoated Elmar which, I now realize, is probably a Russian fake. The serial number is too low for a RF coupled lens, which this is, also the outer diameter of the front mount is infinitesimally smaller so that a 36mm clamp-on filter or lens cap falls off. (Wish I could have afforded a real Leica A.) Interestingly, I can't tell any difference between its performance and my genuine late Leitz Elmar (f:22, and red IR mark), at least from shooting B&W (I haven't tried color). Incidentally, I have been shooting EFKE 25 film and have deduced that a good part of the "Leica look" was actually due to the early film lack of anti-halation backing, producing a slight "glow."