pico Posted December 8, 2010 Share #1 Posted December 8, 2010 Advertisement (gone after registration) I've searched with no luck to find what years (or serial number range) the Summitar had 10 aperture blades (round compared to 6 hexagon shape). I'm looking for one with 10 blades made in 1949 or later. Thank you in advance. 1 Quote Link to post Share on other sites More sharing options...
Advertisement Posted December 8, 2010 Posted December 8, 2010 Hi pico, Take a look here Summitar - 10 aperture blades, years. I'm sure you'll find what you were looking for!
luigi bertolotti Posted December 8, 2010 Share #2 Posted December 8, 2010 I've searched with no luck to find what years (or serial number range) the Summitar had 10 aperture blades (round compared to 6 hexagon shape). I'm looking for one with 10 blades made in 1949 or later. Thank you in advance. According to Laney and Van Hasbroek, the Summitar with six blades (and hexagonal iris) entered in 1951: so an item of 1949-50 should have the old blades which form a round iris. 1 Quote Link to post Share on other sites More sharing options...
UliWer Posted December 8, 2010 Share #3 Posted December 8, 2010 If the list of Thiele is right the hexagonal iris was introduced in 1950 with no. 810.001. So if you look for slightly lower numbers you might find a coated postwar Summitar with round iris. 1 Quote Link to post Share on other sites More sharing options...
pico Posted December 9, 2010 Author Share #4 Posted December 9, 2010 Thank you, one and all for your help. I have set to purchase a 1949 Summitar that appears to be in reasonable condition. We shall see how it works out. Best, Pico Quote Link to post Share on other sites More sharing options...
towermax Posted April 18, 2011 Share #5 Posted April 18, 2011 Excuse me for re-opening an old thread, but this info seems relevant to the discussion . . . My Summitar --serial number 81211x--has 10 blades. I notice that the Summitar entry in the LeicaWiki states: "Diaphragm setting /type - 10-blade / 6-blade after s/n 810001" Perhaps there was some overlap during the transition from 10 blades to 6 blades? Number 810001 may have been the first to have 6 blades, but at least one Summitar with 10 blades was produced at a later time. Quote Link to post Share on other sites More sharing options...
250swb Posted April 19, 2011 Share #6 Posted April 19, 2011 As an aside my Summitar is ten blades (and coated) from 1946, so if anybody is looking you don't have to limit yourself to 1949 onwards. Steve Quote Link to post Share on other sites More sharing options...
luigi bertolotti Posted April 19, 2011 Share #7 Posted April 19, 2011 Advertisement (gone after registration) The batch of Summitars starting with s/n 810.001 was a very big one : 10.000 lenses !!! No strange that they made some with the old diaphragm... probably many semifinished parts, or replacements, were available in the factory. And... Welcome to the Forum !!! If you'll continue to partecipate into this community, you will realize that "in the Leica world, exceptions are the rule"... Quote Link to post Share on other sites More sharing options...
jc_braconi Posted April 19, 2011 Share #8 Posted April 19, 2011 (edited) Excuse me for re-opening an old thread, but this info seems relevant to the discussion . . . My Summitar --serial number 81211x--has 10 blades. I notice that the Summitar entry in the LeicaWiki states: "Diaphragm setting /type - 10-blade / 6-blade after s/n 810001" Perhaps there was some overlap during the transition from 10 blades to 6 blades? Number 810001 may have been the first to have 6 blades, but at least one Summitar with 10 blades was produced at a later time. I have one from 1949 (round blades) 682 4xx and one from 1950 (flat blades) 799 1xx on my web site : IIIb page Edited April 19, 2011 by jc_braconi Quote Link to post Share on other sites More sharing options...
pico Posted April 19, 2011 Author Share #9 Posted April 19, 2011 I prefer the round, 10-blade version. I lucked out finding a very clean, coated version, too. Luigi - thanks for the insight. It makes a lot of sense. Quote Link to post Share on other sites More sharing options...
towermax Posted May 1, 2011 Share #10 Posted May 1, 2011 The batch of Summitars starting with s/n 810.001 was a very big one : 10.000 lenses !!! No strange that they made some with the old diaphragm... probably many semifinished parts, or replacements, were available in the factory. Yes, that's what I thought also--someone found an old bin full of 10-blade kits under a workbench--or something like that. And... Welcome to the Forum !!! If you'll continue to partecipate into this community, you will realize that "in the Leica world, exceptions are the rule"... Thank you for the welcome. I've been visiting here now and then for the last 18 months--since buying a IIIG and Summitar. You are all a great source of information. 1 Quote Link to post Share on other sites More sharing options...
Baybers Posted August 7, 2016 Share #11 Posted August 7, 2016 Mine is a 1950, no.784 xxx with ten blades. Lovely lens. Quote Link to post Share on other sites More sharing options...
Raid Amin Posted November 26, 2020 Share #12 Posted November 26, 2020 On 12/8/2010 at 12:38 PM, luigi bertolotti said: According to Laney and Van Hasbroek, the Summitar with six blades (and hexagonal iris) entered in 1951: so an item of 1949-50 should have the old blades which form a round iris. My Summitar is from 1950 and it has 6 blades only. Quote Link to post Share on other sites More sharing options...
Pyrogallol Posted November 26, 2020 Share #13 Posted November 26, 2020 I have two, 1941 and 46, both ten blades. Quote Link to post Share on other sites More sharing options...
bilbrown Posted December 2, 2021 Share #14 Posted December 2, 2021 On 4/18/2011 at 10:30 AM, towermax said: Excuse me for re-opening an old thread, but this info seems relevant to the discussion . . . My Summitar --serial number 81211x--has 10 blades. I notice that the Summitar entry in the LeicaWiki states: "Diaphragm setting /type - 10-blade / 6-blade after s/n 810001" Perhaps there was some overlap during the transition from 10 blades to 6 blades? Number 810001 may have been the first to have 6 blades, but at least one Summitar with 10 blades was produced at a later time. Mine is 1950 and after 8110xxx and has the round iris. Which I assume is 10 blade. Quote Link to post Share on other sites More sharing options...
thomas_schertel Posted December 2, 2021 Share #15 Posted December 2, 2021 My Sommitar has the number 682096, has 10 blades and is from 1949. yours sincerely Thomas Quote Link to post Share on other sites More sharing options...
qqphot Posted December 3, 2021 Share #16 Posted December 3, 2021 Mine is #722882 (1949,) has 10 blades, and is coated. Quote Link to post Share on other sites More sharing options...
romualdo Posted December 3, 2021 Share #17 Posted December 3, 2021 (edited) I have a 1951 version, 6 blader #846113 - it came with an early iiif BD Edited December 3, 2021 by romualdo Quote Link to post Share on other sites More sharing options...
hilm3 Posted December 3, 2021 Share #18 Posted December 3, 2021 I also have an 1951 version, 6 blade #912869. Quote Link to post Share on other sites More sharing options...
doctorlebel Posted November 3, 2022 Share #19 Posted November 3, 2022 I have a 1950 Summitar 10 blade, round iris aperature lens s/n 811074 Quote Link to post Share on other sites More sharing options...
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