Archived posting to the Leica Users Group, 1997/10/02[Author Prev] [Author Next] [Thread Prev] [Thread Next] [Author Index] [Topic Index] [Home] [Search]
At 09:50 AM 10/2/97 +0200, Alf wrote: > .. 2.2, 3.2, 4.5, 6.3, 9, 12.5, 18, 25 ..., with an additional mark at >f 2.9 for the Agfacolor filter in the early 30ies. There are minor variations on the Stolz scale: I have lenses which are marked f/12, others f/12.5. I believe the markings on the Summar are more accurate than the list I posted. The Agfacolor system was the first commercially available colour system. It mandated the use of special filters both to take and to project the slide. The system was only sold for a couple of years before Kodachrome and its ilk came on the market, though Leitz and several other manufacturers built a fair number of lenses to accomodate it. Marc firstname.lastname@example.org FAX: +540/343-7315 Cha robh bas fir gun ghras fir!