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Fredtheoyster
Tinkerer
Username: Fredtheoyster
Post Number: 4
Registered: 09-2010
Rating: N/A
Votes: 0 (Vote!) | | Posted on Thursday, January 06, 2011 - 02:39 am: | 
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Hello Folks,
Just picked up a 135mm f/4.5 Hektor in 39mm screw mount. Suffering from the dreaded fungus and focussing very rough, both of which I feel confident I can cope with.
However - the screw thread is very tight when mounting it on a Leica camera. It's not the camera because other lenses are OK. There doesn't appear to be any damage to the threads and the problem persists after thorough cleaning. Could anyone suggest a possible reason and appropriate solution? Thanks, Jim |
Glenn
Tinkerer
Username: Glenn
Post Number: 884
Registered: 07-2006
Rating: N/A
Votes: 0 (Vote!) | | Posted on Thursday, January 06, 2011 - 05:06 am: |
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Tight lenses on a Leica screw body usually means that the lenses in question have a 'True' 39mm metric pitch thread. As you will know the 39mm thread used by Leitz was actually an imperial pitch thread - a throw back to the old original English optical standards.
Just why your Hector has this problem is somewhat of a mystery - Has the lens been got at, is it an old Soviet fake? I have no idea what the problem could be caused by. Presumably as you can mount other genuine(?) Leitz lenses on your body, the body is actually of Leitz manufacture and not another clever Soviet fake? |
Fredtheoyster
Tinkerer
Username: Fredtheoyster
Post Number: 5
Registered: 09-2010
Rating: N/A
Votes: 0 (Vote!) | | Posted on Thursday, January 06, 2011 - 06:02 am: |
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Thanks Glenn,
I'm quite certain the camera is genuine, so too all the Leitz lenses, so that one can be eliminated. The likeliest assumption is therefore that the Hektor is genuine, but has somehow been 'got at'. It was bought, very cheaply, from a reputable UK dealer. I'll try next to examine the thread with more than a naked eye. Wonder if someone had once fixed a mount adapter to it with adhesive or some such, and I simlpy haven't cleaned it thoroughly enough? I'll report back any findings just in case someone else ever needs help with an admittedly obscure problem!
J |
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