Archived posting to the Leica Users Group, 1997/10/01
[Author Prev] [Author Next] [Thread Prev] [Thread Next] [Author Index] [Topic Index] [Home] [Search]Barney mis-spoke himself. I do believe I meand Summar, a pre-world war II lens with f-stops which ran from 2 - 12 (?). I'm sorry. Somedays I am quite dangerous early in the morning. Barney >>>>> "Marc" == Marc James Small <msmall@roanoke.infi.net> writes: Marc> At 01:47 AM 10/1/97 -0400, Marvin Moss wrote: >> >> I don't know what Barney means by "funky f-stops" but I have always >> wondered what the reason was for using double iris blades on some >> Summitars and hexagon (?) on others and even a convex shaped iris >> in addition to the normal issue. Any ideas would be appreciated. Marc> Oh, I've owned a couple with the double iris. I can think of no optical or Marc> mechanical reason for this set-up, but these are rare enough to have a lot Marc> of collector interest. Marc> Over to you, Erwin! Marc> Marc Marc> Marc James Small Marc> Cha Robh Bas Fir, Gun Ghras Fir! Marc> FAX: +540/343-7315