| Author |
Message |
    
Jb_
Tinkerer
Username: Jb_
Post Number: 1
Registered: 01-2011
Rating: N/A
Votes: 0 (Vote!) | | Posted on Monday, January 10, 2011 - 12:42 am: | 
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Fellow enthusiasts,
I'm cleaning my girlfriends' vintage TLR and found some unusal brown thing in the shooting lens:
could it be some dislocated plastic or excessive oil?
should i fix it or won't it influence the image at all?
thanks for your help,
joerg |
Glenn
Tinkerer
Username: Glenn
Post Number: 887
Registered: 07-2006
Rating: N/A
Votes: 0 (Vote!) | | Posted on Monday, January 10, 2011 - 02:40 am: |
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This looks like degradation of the Balsam used to cement a couple of the individual glass components of a lens element together. Correcting this is a major job, well beyond the means of most DIY folk and many professional repairers also - one has to separated the glued components and then re-glue after aligning the optical axis of all the components.
The separation as it is will only cause problems at large apertures. Using a brick wall as a test target take a photo at every aperture value - examination of the negs will soon reveal which aperture values are useable. |
Jb_
Tinkerer
Username: Jb_
Post Number: 2
Registered: 01-2011
Rating: N/A
Votes: 0 (Vote!) | | Posted on Monday, January 10, 2011 - 11:36 pm: |
|
thanks for your explanation and the hint with the brick wall. i was also about to shoot one testroll.
cheers,
joerg |
