greeegooor Posted November 3, 2010 Share #1 Posted November 3, 2010 Advertisement (gone after registration) Hi there, I bought a 50mm collapsible Summicron #116.... last week. The lens is in a very good condition. However, after shooting with it today I realized that the aperture ring is just a bit to stiff to turn nicely while looking throuhg the viewfinder. I did a quick search on the web for some repair instructions but couldn't find any. Does somebody know what to do to relube the aperture ring? By the way, do all of the 50mm Crons have such a long focus throw (I do only have the 35mm Ver. IV for comparison). One more thing I noticed is that the aperture index mark of the lens is not centered when looking from the top and the lens is mounted, uncollapsed and the front turned to shooting position. The aperture dot is slightly on the left... Is this the way it is designed? Thanks! Kind regards Gregor Link to post Share on other sites More sharing options...
Advertisement Posted November 3, 2010 Posted November 3, 2010 Hi greeegooor, Take a look here Collapsible Summicron - Aperture ring stiff. I'm sure you'll find what you were looking for!
Xmas Posted November 3, 2010 Share #2 Posted November 3, 2010 Hi there, I bought a 50mm collapsible Summicron #116.... last week. The lens is in a very good condition. However, after shooting with it today I realized that the aperture ring is just a bit to stiff to turn nicely while looking throuhg the viewfinder. I did a quick search on the web for some repair instructions but couldn't find any. Does somebody know what to do to relube the aperture ring? By the way, do all of the 50mm Crons have such a long focus throw (I do only have the 35mm Ver. IV for comparison). One more thing I noticed is that the aperture index mark of the lens is not centered when looking from the top and the lens is mounted, uncollapsed and the front turned to shooting position. The aperture dot is slightly on the left... Is this the way it is designed? Thanks! Kind regards Gregor Hi Gregor Lots of the Leitz lenses had a (approx) 300 degrees focus range. You really need to try lenses for feel before you buy, focus tabs are the other problem for many people. Noel Link to post Share on other sites More sharing options...
greeegooor Posted November 3, 2010 Author Share #3 Posted November 3, 2010 Hi Gregor Lots of the Leitz lenses had a (approx) 300 degrees focus range. You really need to try lenses for feel before you buy, focus tabs are the other problem for many people. Noel Hi Noel, nice to know that there exist such 300 degree lenses. However, I wanted to know if the newer 50 Summicrons do have a shorter focus throw? Thanks! Gregor Link to post Share on other sites More sharing options...
luigi bertolotti Posted November 3, 2010 Share #4 Posted November 3, 2010 The today - listed Summicron 50 has a "modern" focus throw...around 90 degrees. Link to post Share on other sites More sharing options...
greeegooor Posted November 3, 2010 Author Share #5 Posted November 3, 2010 The today - listed Summicron 50 has a "modern" focus throw...around 90 degrees. Thanks! I just read a thread about repairing a Summitar. Is it also possible to unscrew the "head" of the Collapsible Cron? Gregor Link to post Share on other sites More sharing options...
luigi bertolotti Posted November 3, 2010 Share #6 Posted November 3, 2010 No, the removable lens head was an exclusive (and useful) feature of the fixed-mount Summicron 50. Link to post Share on other sites More sharing options...
greeegooor Posted November 3, 2010 Author Share #7 Posted November 3, 2010 Advertisement (gone after registration) Ok, I solved the problem with the aperture ring. After unscrewing the front of the lens (the part that is knurled, like you do on the Summitar) you can remove the aperture ring by removing the two screws on the side of the ring. Now you can apply some lighter fluid and remove the old grease. Voilá! My second problem regarding the displaced aperture index mark I solved also. I did bend the little metal strips on the mount side of the lens, which tighten the lens after uncollapsing, a bit out. Great! So, now back let's get back outside and: Yes, no, no, no, yes! Link to post Share on other sites More sharing options...
luigi bertolotti Posted November 4, 2010 Share #8 Posted November 4, 2010 Yup, compliments for your DOY capability... ... of course I meant that Summicron lens head is unremovable as a "user feature" for Visoflex using... Link to post Share on other sites More sharing options...
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