carlos.paula Posted May 12, 2014 Share #1 Posted May 12, 2014 Advertisement (gone after registration) Dear friends, last week I purchased a very beautiful and near mint condition rigid Summicron 50mm F:1,0 Dual Range, complete with the "glasses" and leather case. The lens condition is superb. Reading about that, I discovered that this lens can be unscrewed in his middle section, and giving the possbility for use it in another way. Well, I can not unscrew it, it is very tight. My doubt is: all lenses like this has this possibility? Thanks a lot. Link to post Share on other sites More sharing options...
Advertisement Posted May 12, 2014 Posted May 12, 2014 Hi carlos.paula, Take a look here Summicron 50mm F:2,0 Dual Range. I'm sure you'll find what you were looking for!
A miller Posted May 12, 2014 Share #2 Posted May 12, 2014 That doesn't sound right. The lens has a second focus range. To use it, you need to turn the focus ring all the way to the right and then pull on the focus ring and continue to turn it. Aside from this, there is no other "unscrewing" that I would recommend. It may be possible to unscrew one or more of the elements of the lens as part of taking the lens apart. But I wouldn't do this either and would leave it to your technician, whom I hope you'll never need. It's a great lens. One of the best ever from Leica. My only regret is that it doesn't work on their digital bodies.... Link to post Share on other sites More sharing options...
rirakuma Posted May 12, 2014 Share #3 Posted May 12, 2014 A friend of mine recently sold me his modified DR. It works perfectly on my M240 and you can freely transition to the close range without any bumps. It was modified by a guy from Camera Clinic, I think they still offer this mod. You lose coupling when focusing at closer distance but its spot on at 1m+. Link to post Share on other sites More sharing options...
gyoung Posted May 13, 2014 Share #4 Posted May 13, 2014 The optical cell ofthe first rigid version of the Summicron can be unscrewed from the focussing mount for use on various close up devices or even on an enlarger. I am prettty sure the DR version is the same. If it hasnt been unscrewed for 50 years it will be a bit stiff! Gerry Sent from my GT-I9505 using Tapatalk Link to post Share on other sites More sharing options...
luigi bertolotti Posted May 13, 2014 Share #5 Posted May 13, 2014 The optical cell ofthe first rigid version of the Summicron can be unscrewed from the focussing mount for use on various close up devices or even on an enlarger. I am prettty sure the DR version is the same.If it hasnt been unscrewed for 50 years it will be a bit stiff! Gerry Sent from my GT-I9505 using Tapatalk Yes the DR has the usual removable lenshead as all the other Summicron 50 of that era, and the mechanism is exactly the same (a simple thread) because all the differences regarding the DR are inside the focusing mount, from which you unscrev the lens' head. Btw, i regularly use this feature on my Summicron DR... I mount the lensehead on the SOMKY+UOORF accessory, so that it is usable on digital M at the same short distances of the original DR (which, as it is, cannot be used on digital Ms) Link to post Share on other sites More sharing options...
tobey bilek Posted May 14, 2014 Share #6 Posted May 14, 2014 It unscrews, problem being they are either very tight from the factory or they were never removed from the mount for 50 years and there is some corrosion holding. I had the issue with my version 3 for 1969/79. Lots of force broke it loose. Link to post Share on other sites More sharing options...
A miller Posted May 14, 2014 Share #7 Posted May 14, 2014 Advertisement (gone after registration) Why anyone in this day and age with this age of a lens would want to use a lot of force is frazzling! One needs to remember that spare parts for these old lenses are often very hard to come by. I follow the motto that "if it aint broken, dont break it :)" Link to post Share on other sites More sharing options...
luigi bertolotti Posted May 14, 2014 Share #8 Posted May 14, 2014 I think that some expert could give an advice on how to "soften" a lenshead that, maybe, has never been unscrewed : it is delicate because you haven't the thread "at sight" ... but there can be the way to "inject" some appropriate chemical made just for those purposes: what is sure is that Summicrons were made with TOP QUALITY materials, TOP QUALITY machining cycles, TOP QUALITY assembly procedures : one has not to expect bad conditions in the coupling of the parts : my Summicron DR dates to 1963.... I bought it (iirc) in 1988... had the feeling the lenshead was never been removed,,, with the right force, I unscrewd it (revealing the internal factory sticker with the s/n of the lens, applied onto the focusing mount) : what was evident was just a slight difference in the chrome finishing of the lenshead's barrel : part of it had probably never seen light in 25 years, while the other half of course had normally been exposed to light, touch etc... Link to post Share on other sites More sharing options...
carlos.paula Posted May 14, 2014 Author Share #9 Posted May 14, 2014 Ok, friends. I will not try to unscrew it any more. There are a lot of danger to broke another component. In fact I will not need to do anything with the head of the lens. For bellows using I have an Hektor 135 (with separated head) and an Elmar 90mm. This Summicron I am using it in my Sony NEX, through an adapter and the results are superb. I can use both their ranges, without the glasses, of course, by means pressing the small retaining button on top. Works fine, no trouble. Link to post Share on other sites More sharing options...
Ronazle Posted May 14, 2014 Share #10 Posted May 14, 2014 Everything Luigi has said is absolutely correct. I just unscrewed my DR (17043495) in the same manner as the other early rigid Summicrons. I have used the front element of early rigid summicronws for several close-up situations, but have never before unscrewed the DR - it came apart easily as it was meant to do. Be careful if great force is needed. Regards, Ron. Link to post Share on other sites More sharing options...
A miller Posted May 14, 2014 Share #11 Posted May 14, 2014 Ok, friends. I will not try to unscrew it any more. There are a lot of danger to broke another component. In fact I will not need to do anything with the head of the lens. For bellows using I have an Hektor 135 (with separated head) and an Elmar 90mm. This Summicron I am using it in my Sony NEX, through an adapter and the results are superb. I can use both their ranges, without the glasses, of course, by means pressing the small retaining button on top. Works fine, no trouble. Wow, that is really cool that you can use the close up focusing range on the Sony NEX. If Sony can do it, why can't Leica?? Link to post Share on other sites More sharing options...
xalo Posted May 14, 2014 Share #12 Posted May 14, 2014 Wow, that is really cool that you can use the close up focusing range on the Sony NEX. If Sony can do it, why can't Leica?? Adam, don't rage and enjoy your M3. For using it on a digital Leica, a USD 1,800 (+) accessory was developed, the Leica T Cheers, Alexander P.S.: My fire sale Eos M takes the DR 50 with close range, too. Link to post Share on other sites More sharing options...
A miller Posted May 14, 2014 Share #13 Posted May 14, 2014 Adam, don't rage and enjoy your M3.For using it on a digital Leica, a USD 1,800 (+) accessory was developed, the Leica T Cheers, Alexander P.S.: My fire sale Eos M takes the DR 50 with close range, too. Very funny, Alexander. Don't forget the extra $600 needed to purchase the M adapter on that new Leica T I'm also dumbfounded by your point about the Eos M. Perhaps this will catch on push up the secondary market value of this lengendary lens, which has heretofore been suppressed by the [perceived] restriction of use on film Ms... [Wishful thinking, I'm sure ] Link to post Share on other sites More sharing options...
xalo Posted May 14, 2014 Share #14 Posted May 14, 2014 Don't forget the extra $600 needed to purchase the M adapter on that new Leica T How could I forget this detail? Did I mention that the Summicron DR also works nicely on the Epson RD-1? (No close range or only impractical guestimating/distance measuring, though.) Link to post Share on other sites More sharing options...
A miller Posted May 14, 2014 Share #15 Posted May 14, 2014 How could I forget this detail? Did I mention that the Summicron DR also works nicely on the Epson RD-1? (No close range or only impractical guestimating/distance measuring, though.) Wow, I'll bet that'd be an interesting camera/lens combo to see! Link to post Share on other sites More sharing options...
sblutter Posted May 14, 2014 Share #16 Posted May 14, 2014 The lens cell and the focusing mount were calibrated to each other with matching serial numbers in the factory When buying one, make sure they're a set Link to post Share on other sites More sharing options...
luigi bertolotti Posted May 14, 2014 Share #17 Posted May 14, 2014 Wow, that is really cool that you can use the close up focusing range on the Sony NEX. If Sony can do it, why can't Leica?? Just for the record... (on M 240 only) 1) Find an OUFRO (or a Chinese copy) 2) Take the goggle off 3) Mount OUFRO on M, Summicron on OUFRO 4) Use LV (and EVF) ... and you have a very good macro set , quite portable, with a rather wide range of macro focusing... (higher repro ratio than with the SOMKY+UOORF set I quoted in post #5... which, btw, is not available from Chinese but must be found on the used market... ) <LONG LIFE TO THE DR !!!> Link to post Share on other sites More sharing options...
A miller Posted May 14, 2014 Share #18 Posted May 14, 2014 Just for the record... (on M 240 only)1) Find an OUFRO (or a Chinese copy) 2) Take the goggle off 3) Mount OUFRO on M, Summicron on OUFRO 4) Use LV (and EVF) ... and you have a very good macro set , quite portable, with a rather wide range of macro focusing... (higher repro ratio than with the SOMKY+UOORF set I quoted in post #5... which, btw, is not available from Chinese but must be found on the used market... ) <LONG LIFE TO THE DR !!!> Amazing! Thanks for the enlightenment! Link to post Share on other sites More sharing options...
xalo Posted May 14, 2014 Share #19 Posted May 14, 2014 Wow, I'll bet that'd be an interesting camera/lens combo to see! Adam, since you asked (taken with an Elmarit 90 head contemporary to the 50 Dual Range, on OTZFO helicoid, 14167 M to R ring, adapted to an Eos 5D) Welcome, dear visitor! As registered member you'd see an image here… Simply register for free here – We are always happy to welcome new members! Link to post Share on other sites Simply register for free here – We are always happy to welcome new members! ' data-webShareUrl='https://www.l-camera-forum.com/topic/227007-summicron-50mm-f20-dual-range/?do=findComment&comment=2590467'>More sharing options...
A miller Posted May 14, 2014 Share #20 Posted May 14, 2014 Adam, since you asked (taken with an Elmarit 90 head contemporary to the 50 Dual Range, on OTZFO helicoid, 14167 M to R ring, adapted to an Eos 5D) wow, that is so cool. Thanks for sharing! And your lens looks in great shape! Link to post Share on other sites More sharing options...
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