luigi bertolotti Posted February 19, 2021 Share #21 Posted February 19, 2021 (edited) Advertisement (gone after registration) I speculate that "N" is the "signature" of the controller... whilst the 1st number (above "57") ar the two last digits of the s/n... I have similar engraving in my DR (1785704 - "4" hand engraved - and then the "51,9" My Cron non DR is a bit later (1986334) and has not hand engraving about focal... but has the well known "19" engraved in the usual postion next to distance scales... the position they have used for years to detail the exact focal length, in many lenses including 90s and 135s Edited February 19, 2021 by luigi bertolotti Link to post Share on other sites More sharing options...
Advertisement Posted February 19, 2021 Posted February 19, 2021 Hi luigi bertolotti, Take a look here Can anyone help me identify this lens? . I'm sure you'll find what you were looking for!
wlaidlaw Posted February 20, 2021 Share #22 Posted February 20, 2021 (edited) I wonder if failing to find the correct focusing mount, it could be used on a 16464K focusing mount meant for the Elmar 65 head on a Visoflex, as that has an M bayonet. It would not of course have RF coupling but could be used, if the flange focal distance is correct, on a live view M. 16464 focusing mounts are fairly readily available and cheap. Tomorrow I will measure the thread and the front to back mounts distance of a 16464K to see if that might be a possibility. Wilson PS If the OP is UK based, I would be happy to lend him one of my two 16464K focusing helicoids to have a try. Edited February 20, 2021 by wlaidlaw Link to post Share on other sites More sharing options...
jpattison Posted February 21, 2021 Share #23 Posted February 21, 2021 (edited) 16 hours ago, wlaidlaw said: PS If the OP is UK based, I would be happy to lend him one of my two 16464K focusing helicoids to have a try. he said Curb, and not sidewalk, so I would have said yes, but his ID shows USA! Edited February 21, 2021 by jpattison spelling 1 Link to post Share on other sites More sharing options...
rfaspen Posted February 21, 2021 Share #24 Posted February 21, 2021 Will a rigid summicron head thread into a 16464? I don't have a rigid to check, but I would confirm that first, then see if it provides a reasonable focus range. Link to post Share on other sites More sharing options...
wlaidlaw Posted February 21, 2021 Share #25 Posted February 21, 2021 Didn't get round to it today as busy but will do some measurements tomorrow afternoon on 16464K and post here. Wilson Link to post Share on other sites More sharing options...
luigi bertolotti Posted February 21, 2021 Share #26 Posted February 21, 2021 4 hours ago, rfaspen said: Will a rigid summicron head thread into a 16464? I don't have a rigid to check, but I would confirm that first, then see if it provides a reasonable focus range. I've just tried... does not fit : the problem isn't the thread, but the 16464 front ring : too narrow for Summicron head, which does not enter to reach the thread. 1 Link to post Share on other sites More sharing options...
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