But it's the Dual Range lens you have rather than the C/f Summicron, I'm looking at the wrong thing. Maybe someone else will pitch in to help first.Īh-ha! I was thinking yesterday that that's probably the C/f Summicron.* but see below I have Osterloh's book on Leitz somewhere but am not sure how easily & quickly I can get at it & the relevant info. I am comforted by the fact that Rockwell also gets confused by C/f & D/r Summicrons and possibly has not noticed the '100ft' version. If you can get hold of a Lager book, there may be more definitive info in there. There are two D/r Summicrons shown in the Rockwell link one has the 100ft mark the other does not. This is a screw mount (M39) and collapsible version of the summicron. The different versions are: Main Reference: Ken Rockwell. The storied history will create some confusion for you if you are shopping for one because there are so many versions of this lens.
This is one of the things that is great fun, if you like or at least are not irritated by these little snippets, inconsistencies & arcane gems that go to make up 'Leica-lore'. Leica has been making a 50mm Summicron since 1953. Have an even fainter notion that on a 50mm, 100ft may = infinity anyway. If I had read your post more carefully and clicked on your link I would have discovered that. But it's the Dual Range lens you have rather than the C/f Summicron, I'm looking at the wrong thing. 36"! Auughh! Likewise, nothing clearly visible on the two C/f lenses on offer at Red Dot. Have just had a squint at Rogliatti but on p.62 it helpfully shows the lens at a distance a normal focus Summicron might be used at, ie. I have handled one - it was a long time ago - and have a very faint notion in the back of my mind that it has that strange distance marking. Click to expand.Ah-ha! I was thinking yesterday that that's probably the C/f Summicron.* but see below