Archived posting to the Leica Users Group, 1998/04/23
[Author Prev] [Author Next] [Thread Prev] [Thread Next] [Author Index] [Topic Index] [Home] [Search]At 23:41 22.04.1998 +0200, I asked: >One more: In 50 mm lenses, usually the right f 2.0 DOF sign >corresponds to the IR mark. Is it true for the Noctilux also ? Ulrich Deiss, Leica-Camera, answered to me: Leica doesn't indicate the IR sign on its lenses since decades. Depending on both, film and filter, the IR sign is located at focal length plus between 1/200 and 1/400 of the focal length. The exact location must be found by preceding tests of the intended film-filter-combination. Alf - -------------------------------------------------- Alfred Breull http://members.aol.com/abreull/index.htm http://members.aol.com/mfformat/c-mf.htm