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Message |
    
Kapuxino
Tinkerer
Username: Kapuxino
Post Number: 1
Registered: 10-2007
Rating: N/A
Votes: 0 (Vote!) | | Posted on Saturday, October 06, 2007 - 07:42 am: | 
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Hi! I'm trying to disassembly a Zeiss Planar 50mm 1,4 (contax mount), but I'm not able to disassembly the front elements. I have tried to unscrew the front ring (where the "Carl Zeiss" and the text is), but it is just imposible.
Has anyone done this? I need some help! I have found NO information about this on the internet :S
-Pablo |
Rj_
Tinkerer
Username: Rj_
Post Number: 35
Registered: 08-2007
Rating: N/A
Votes: 0 (Vote!) | | Posted on Saturday, October 06, 2007 - 09:21 am: |
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Pablo,
That's very daring - is there any purpose for your disassembly?
The Contax Planar is a 6 element design unlike the modern Planar offering for Nikon which is a 7 element design.
The arrangement of the cells means that the front ring (with inscription) is actually cemented in with the front most element of the Planar lens. Therefore if you are trying to replace the front ring, you will most likely destroy the front element in this way. This is the most logical explanation I can think of to explain why you found it impossible.
Kind regards,
RJ |
Kapuxino
Tinkerer
Username: Kapuxino
Post Number: 2
Registered: 10-2007
Rating: N/A
Votes: 0 (Vote!) | | Posted on Saturday, October 06, 2007 - 09:53 am: |
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Hi RJ! Thanks for replying. I need to clean the lens, there are some big dust particles that does affect IQ.
Are you sure? :S I have found that the front element rotates indefinitely, and that the ring that is between the front ring and the element rotates too, but it does not seem to unscrew.
I'll be careful 
Thanks!
-Pablo |
Rj_
Tinkerer
Username: Rj_
Post Number: 40
Registered: 08-2007
Rating: N/A
Votes: 0 (Vote!) | | Posted on Saturday, October 06, 2007 - 11:48 am: |
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Hi Pablo,
the front element may rotate even if is cemented: does it rotate independently of the front ring?
I have the front ring from my Planar 100mm extracted, and that required removal of the front element of the lens by the Zeiss technicians in Germany. There was no other way to do it due to the lens' construction.
On the other hand, 3rd party lenses such as Sigma who made C/Y zooms, did not have the same cemented construction: just by adding a UV filter to a Sigma lens, it is possible to unscrew the front element. |
Kapuxino
Tinkerer
Username: Kapuxino
Post Number: 3
Registered: 10-2007
Rating: N/A
Votes: 0 (Vote!) | | Posted on Sunday, October 07, 2007 - 02:51 am: |
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Hi RJ,
These aren't good news...
Yes the front element rotates independently of the front ring.
How much could cost to send the lens for CLA?
Thanks RJ for your time and advice!
-Pablo |
Rj_
Tinkerer
Username: Rj_
Post Number: 41
Registered: 08-2007
Rating: N/A
Votes: 0 (Vote!) | | Posted on Sunday, October 07, 2007 - 02:35 pm: |
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Hi Pablo,
which country are you in?
A CLA' for a Zeiss C/Y lens should realistically cost in the order of $50-150, by a skilled technician.
The Zeiss factory is significantly more costly, however cover more complex lens issues.
If you would like a Zeiss repair recommendation, pop me an email at my website contact address.
Kind regards,
RJ
www.luxcamera.co.uk |
