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10-04-2020, 12:23 PM   #1
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Repair of carl zeiss jena 135mm

Hello, out of curiosity I opened up this lens and I can't quite put it back as it was.


I have only partially dismounted it (the top portion up to the aperture selection mechanism). There are two tiny metal spheres which fell out but I believe I put them back in the correct place. The one thing that bothers me is that the automatic-manual switch is a bit loose. Any suggestions?

Thank you

10-04-2020, 02:20 PM   #2
PJ1
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The "metal spheres" are ball bearings that sometimes provide friction in switches. Anyway, I have a copy of an article "The Complete Guide to Disassembling and Cleaning the Carl Zeiss Jena 135mm f/3.5 Lens". It does not show the "zebra" lens but I think the mechanics of the 135/3.5 were all the same. I will PM you so I can send you a copy of the article if you would like it.
Peter
10-04-2020, 02:33 PM   #3
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Indeed I had misplaced the second bearing, now the switch clicks nicely.
10-04-2020, 02:57 PM - 1 Like   #4
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If one doesn't know what they are doing when disassembling a lens it's always a good idea to video the entire process. If this type of thing happens again, you can watch the video and all of your re-assembly questions will be answered.

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