Archived posting to the Leica Users Group, 2003/05/11
[Author Prev] [Author Next] [Thread Prev] [Thread Next] [Author Index] [Topic Index] [Home] [Search]Jerry, So only the Model D (II), the first Leica with built in rangefinder, had no RF magnification? Probably not too many using that one today. It seems the interest is in the IIIc/IIIf/IIIg with some interested in the IIIa The viewfinder is another issue of course and I think only the IIIg has a worthy finder. The others all need brighline finders on the acc shoe. (IMO of course, YMMV ;-) Dennis Jerry Lehrer wrote: > Dennis > > Models made before the III had no RF magnification. > > Jerry > > Dennis Painter wrote: > > > Jerry, > > > > I think you will find references showing that the threadmount Leicas with the > > 1.5x magnification on the rangefinder are more than accurate to focus the > > faster and longer lenses. Unless you believe Effective Base Length (EBL) is a > > myth. > > > > IIIf has an EBL of 39 x 1.5 = 58.5 > > M6 .85 has an EBL of 69.25 x 0.85 =58.7 > > M6 .72 has an EBL of 69.25 x 0.72 = 49.7 > > M6 .58 has an EBL of 69.25 x 0.58 = 40.2 > > M3 has an EBL of 69.25 x 0.91 = 63.0 > > > > So the M3 should be more accurate than a IIIf, and the IIIf as good as or > > better than the M6. > > > > I have never seen a Leica RF threadmount without a built-in magnifier. Was > > there such a Leica? > > > > Dennis > > > > Jerry Lehrer wrote: > > > > > Greg > > > > > > The SM Leicas never had a long enough rangefinder > > > base to accurately focus the faster or longer lenses. > > > Especially the ones without RF magnifiers built in. > > > > > > There just is no substitute for a long "wheelbase" RF. > > > > > > Jerry > > > > > > "Greg J. Lorenzo" wrote: > > > > > > > Just what I'd like Leica to start building again, a iiif or iiig (but > > > > this time) with M Mount. > > > > > > > > Regards, > > > > > > > > Greg > > > > -- - -- To unsubscribe, see http://mejac.palo-alto.ca.us/leica-users/unsub.html