roydonian Posted November 23, 2010 Share #1 Posted November 23, 2010 Advertisement (gone after registration) How can one tell if an M-mount close-up adaptor is the later 16509 version able to accept the UOORF adaptor, or is the earlier 16507 model that cannot? Looking behind the mounting points for the bayonet on mine, there is a seems to be a short section (only a couple of millimetres deep) with a very fine screw thread, followed by a deeper and slightly wider-diameter section with what looks at first sight to be a coarser-thread section, but is practice is anti-reflective grooves. At first, I assumed that the finer thread was for the UOORF, but looking at the only photo of the latter that I've seen, there is no sign of a matching thread. It looks like it has bayonet lugs. If so, why can't it fit both models of adaptor? Best regards, Doug Link to post Share on other sites More sharing options...
Advertisement Posted November 23, 2010 Posted November 23, 2010 Hi roydonian, Take a look here M-mount close-up adaptor & UOORF. I'm sure you'll find what you were looking for!
luigi bertolotti Posted November 23, 2010 Share #2 Posted November 23, 2010 Sorry, do not understand ... afaik, the 16507 was named SOMKY originally, and just from the start it allowed to fit the bayonet-mounted UOORF : UOORF has the same bayonet of the lens'tube of the collapsible 50mm lenses for which SOMKY was made. 16509 (see 1964 catalog, for instance) is simply the commercial code for SOMKY+UOORF (to say, 16507+16508) Link to post Share on other sites More sharing options...
jc_braconi Posted November 23, 2010 Share #3 Posted November 23, 2010 How can one tell if an M-mount close-up adaptor is the later 16509 version able to accept the UOORF adaptor, or is the earlier 16507 model that cannot? Looking behind the mounting points for the bayonet on mine, there is a seems to be a short section (only a couple of millimetres deep) with a very fine screw thread, followed by a deeper and slightly wider-diameter section with what looks at first sight to be a coarser-thread section, but is practice is anti-reflective grooves. At first, I assumed that the finer thread was for the UOORF, but looking at the only photo of the latter that I've seen, there is no sign of a matching thread. It looks like it has bayonet lugs. If so, why can't it fit both models of adaptor? Best regards, Doug SOMKY alone is for using the "collapsible" Summicron 2/50, the bayonet on the tubus is used to fix it on. UOORF is used in conjuction with SOMKY when you use the lens head of the rigid Summicron 2/50. Link to post Share on other sites More sharing options...
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