Re-assembling a vintage Tessar

[Joao]

Hello
Dumb question, probably:
I have the opportunity to buy a chrome CZ Tessar 2,8 /50 that is separated in two parts



The glass is clean and the diaphragm is working well. No parts are missing.
My question: Is the re-assembling of these two halves a specialist job or should I buy it and try to do it myself (I have no experience is shimming or other techniques involved in lens adjustment).
Thank you for your opinions
Joao

 

[retinax]

Sorry, I know nothing about this lens in particular. But I'd be cautious, there probably is a reason why it was taken apart, and a reason why it hasn't been put together by the current owner. And there could be new issues due to it laying around and being shipped in parts, such as dirt getting into the grease or the somewhat fragile aluminium helical getting dented, which would be very hard to repair.

 

[jarski]

My question: Is the re-assembling of these two halves a specialist job or should I buy it and try to do it myself

you can go to YouTube, your lens model + assembly/repair/other keyword. if you find same model, and following video seems possible, then buy the parts and try repeat the process. I would not pay much for those parts in any case.

 

[Livesteamer]

I would guess that it was taken apart because the grease in the focusing helical had petrified. I have some similar lenses that suffer from this. Is it an East German lens? Joe

 

[Joao]

I would guess that it was taken apart because the grease in the focusing helical had petrified. I have some similar lenses that suffer from this. Is it an East German lens? Joe

Yes, it is a DDR lens.
And I will check youtube for videos.
Thanks
Joao

 

[traveler_101]

Yes, it is a DDR lens.
And I will check youtube for videos .
Thanks
Joao

Here

https://www.youtube.com/watch?v=8QrbVpwB5xo

 

[Joao]

Thanks. The video is very clear.
I will take my chance -the sellerr is reliable, I had previous positive experiences buying from him.
I am grateful for all the input.
Regards
Joao