seekwul Posted January 12, 2015 Share #1 Posted January 12, 2015 Advertisement (gone after registration) Hi Sorry if this has been asked already - I ran a few searches and was unable to turn anything up. As far as I can tell, there are R lenses available on the secondary market that are billed as having 1, 2 or 3 cams. Which of these would I want if I were only going to use the lens on the M-R adapter on an M 240 (or M-P 240) ? Thanks in advance ! Link to post Share on other sites More sharing options...
Advertisement Posted January 12, 2015 Posted January 12, 2015 Hi seekwul, Take a look here Question about R lenses on M240 with adapter. I'm sure you'll find what you were looking for!
lct Posted January 12, 2015 Share #2 Posted January 12, 2015 The number of cams is not relevant when using R lenses on the M240 or any other digital M. Link to post Share on other sites More sharing options...
jaapv Posted January 12, 2015 Share #3 Posted January 12, 2015 The same for ROM Link to post Share on other sites More sharing options...
bocaburger Posted January 13, 2015 Share #4 Posted January 13, 2015 From a mechanical standpoint the above 2 replies are correct. From an optical/IQ standpoint it gets a bit more complicated. 1-cam lenses are the oldest, dating from the original Leicaflex, 2-cam lenses came about with the SL, 3-cam came about with the Minolta-based R3, then 3rd-cam-only lenses, and finally ROM lenses along with the R8. Along the way the lens range was expanded, new versions of many lenses replaced older ones, and it is also said that even on those lenses whose optical formulae did not change, there were improvements in coatings. To further complicate matters, Leica and independent repair people offered update conversions, so it is not reliable to judge a lens' age or version based on the number of cams or if it has a ROM chip. I suggest doing some research into Leica R lenses if you plan on purchasing them now. Link to post Share on other sites More sharing options...
jaapv Posted January 13, 2015 Share #5 Posted January 13, 2015 Complicated by the fact that some lenses acquired a ROM during their production life, so there are ROM and non-ROM versions of otherwise identical lenses. Link to post Share on other sites More sharing options...
CheshireCat Posted January 15, 2015 Share #6 Posted January 15, 2015 Rule of thumb: if your need to choose among several "identical" lenses, and you cannot test them, then go for the one with the highest serial number. Link to post Share on other sites More sharing options...
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