telewatt Posted January 24, 2011 Share #1 Posted January 24, 2011 Advertisement (gone after registration) I found in a Lens part list (1952) two different Elmars listed....... You can see the different Numbers of the parts, lenses and drawing (the drawings are missing... ) (from Lens No. 650 701 was the new one) All the other lenses (Hektor, Summar, Summitar, Xenon, Summarit, Summarex Hektor) are listed only one time.... [ATTACH]241159[/ATTACH] [ATTACH]241160[/ATTACH] [ATTACH]241161[/ATTACH] regards, Jan Link to post Share on other sites More sharing options...
Advertisement Posted January 24, 2011 Posted January 24, 2011 Hi telewatt, Take a look here Elmar 3,5/50mm 1948 modified ?. I'm sure you'll find what you were looking for!
luigi bertolotti Posted January 24, 2011 Share #2 Posted January 24, 2011 Interesting manual; but I think is not strange that there are different parts for Elmar 5... it is reported (Lager) that the lens underwent modifications in the years after WWII (and, notice, the code of the lens assemblies IS different, whilst some other codes are the same)... I do not remember exactly (no docs here) but the optical modification seems to me coincident with the black scale to red scale switch... which can explain other different codes in the above pages Link to post Share on other sites More sharing options...
telewatt Posted January 24, 2011 Author Share #3 Posted January 24, 2011 Interesting manual; but I think is not strange that there are different parts for Elmar 5... it is reported (Lager) that the lens underwent modifications in the years after WWII (and, notice, the code of the lens assemblies IS different, whilst some other codes are the same)... I do not remember exactly (no docs here) but the optical modification seems to me coincident with the black scale to red scale switch... which can explain other different codes in the above pages The other lenses had modifications too, but only the Elmar has two sides here, so it should be a important change for technical work and for the lens too, but you can't find it in the literature like Lager......they all talking on "red scale" change 1952.... it does not make a sense for me doing two pages with a turning point No. if it is not a bigger change..... the problem is the drawings are not in! regards, Jan Link to post Share on other sites More sharing options...
jc_braconi Posted January 24, 2011 Share #4 Posted January 24, 2011 from Lens No. 650 701 the diaphragme scale stops at f22 in place of f16. last 300 pieces of a batch of 4000 (647 001 - 651 000) 1948. Link to post Share on other sites More sharing options...
UliWer Posted January 24, 2011 Share #5 Posted January 24, 2011 Laney in his "Leica Collector's Guide, 2nd. edit. 2005, S. 226 gives the following clue: "...(it has been suggested that for a brief period there was an intermediate design.") He cites for this on p. 279: "Nicholson-Johnson, B&A, Viewfinder, 1997, 30, No.1, p32." Does anybody know this publication? Link to post Share on other sites More sharing options...
roydonian Posted January 25, 2011 Share #6 Posted January 25, 2011 Laney in his "Leica Collector's Guide, 2nd. edit. 2005, S. 226 gives the following clue: "...(it has been suggested that for a brief period there was an intermediate design.") He cites for this on p. 279: "Nicholson-Johnson, B&A, Viewfinder, 1997, 30, No.1, p32." Does anybody know this publication? ‘Viewfinder’ is the quarterly journal of the organisation that for the moment at least is still the Leica Historical Society of America (but is likely to drop that ‘H-word’ later this year). The passage in question reads: “First, we must consider the curvature of the front element. The Red-scale is slightlv less strongly curved than the regular pre-war type and the early post-war black scale lenses have an identical front element curvature to the prewar version. By around 1950, the front curve became slightly flatter (we have a lens showing this}, but not as flat as the Red-scale.” Doug Richardson Link to post Share on other sites More sharing options...
Pecole Posted January 26, 2011 Share #7 Posted January 26, 2011 Advertisement (gone after registration) Laney in his "Leica Collector's Guide, 2nd. edit. 2005, S. 226 gives the following clue: "...(it has been suggested that for a brief period there was an intermediate design.") He cites for this on p. 279: "Nicholson-Johnson, B&A, Viewfinder, 1997, 30, No.1, p32." Does anybody know this publication? Viewfinder is a quarterly publication by the Leica Historical Society of America. It is published since 1968 (nº 4 for 2010-Volume 43 was issued in December last) and was co-founded - among others - by James Lager. It is definitely an authoritative publication, and I often rely on my complete collection for references. Link to post Share on other sites More sharing options...
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