klitton Posted August 13, 2008 Share #1 Posted August 13, 2008 Advertisement (gone after registration) If I understand correctly, my newly acquired IIIc is an L39 mount. When did Leica change the screwmount size from the L39 to the M39? Was it with the introduction of the IIIg? If I have this all wrong, please tell me. Link to post Share on other sites More sharing options...
Advertisement Posted August 13, 2008 Posted August 13, 2008 Hi klitton, Take a look here Screw-Mount Question. I'm sure you'll find what you were looking for!
fuchs Posted August 13, 2008 Share #2 Posted August 13, 2008 LSM: Leica Screw Mount LTM: Leica Thread Mount L39: Leica 39mm diameter x 26 turns/inch M39: 39mm diameter x 1 turn/mm LSM = LTM = L39, as used in all Leica threadmount cameras, including the IIIG, maintaining a 28,8 mm film-to-flange distance M39 = as used by most 35mm and MF enlarging lenses, and some cameras, with a different film-to-flange distance Best, Ed Albesi Link to post Share on other sites More sharing options...
klitton Posted August 13, 2008 Author Share #3 Posted August 13, 2008 Ok. The reason I asked was I wanted to buy a rear cap for a 35cm Summaron f3.5 and was told by the seller (on eBay) that the cap was for M39 and would not fit my lens. Link to post Share on other sites More sharing options...
fuchs Posted August 13, 2008 Share #4 Posted August 13, 2008 I understand that there's less than 0,7 mm in difference between M39 and L39 threads. You should have no problems with a rear cap. I would not tighten it too much though. Ed Link to post Share on other sites More sharing options...
fuchs Posted August 14, 2008 Share #5 Posted August 14, 2008 I understand that there's less than 0,7 mm in difference between M39 and L39 threads. You should have no problems with a rear cap. I would not tighten it too much though. Ed Sorry, typo: I should have written 0.07mm, not 0.7mm Link to post Share on other sites More sharing options...
Recommended Posts
Archived
This topic is now archived and is closed to further replies.