Archived posting to the Leica Users Group, 2008/04/21
[Author Prev] [Author Next] [Thread Prev] [Thread Next] [Author Index] [Topic Index] [Home] [Search]> > Adam: It isn't a question of microlenses. Focus shift as one stops down is > an optical property of many fast lenses, including the double gauss and > Sonnar families. > > Mark R: The Noctilux focus shift is well-known and even documented by > Leica. It happened visibly even on film. It isn't stupidity, or even > hydrogen, it's physics. A newer design could minimize the issue--floating > elements, aspherics, etc. THAT'S COOL PETER! SHOW ME in the Leica literature where it says that when you stop down your 5 grand Noctilux 2 stops it goes out of focus! Have you got a URL? First three letters of the authors last name? Mark William Rabiner markrabiner.com