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peter pan
Joined: 04 Nov 2014
Posts: 3
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 Posted: Tue Nov 04, 2014 3:59 am Post subject: Jena Tessar 50 f2.8 special Ver. no screw on rear case |
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peter pan wrote:
Jena Tessar 50 f2.8 special Ver. no screw on rear case. wish to have some tips to open it for servicing. already google-ed for 3 days but no results at all. the Jena babby needs to be serviced immediately. |
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peterqd
Joined: 28 Feb 2007
Posts: 7448
Location: near High Wycombe, UK
Expire: 2014-01-04
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| Posted: Tue Nov 04, 2014 4:33 am Post subject: Re: Jena Tessar 50 f2.8 special Ver. no screw on rear case |
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peterqd wrote:
| peter pan wrote: |
Jena Tessar 50 f2.8 special Ver. no screw on rear case. wish to have some tips to open it for servicing. already google-ed for 3 days but no results at all. the Jena babby needs to be serviced immediately. |
I'm quoting your message in order for your pictures to show. You will be fine from now on. This helps prevent spam.
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peterqd
Joined: 28 Feb 2007
Posts: 7448
Location: near High Wycombe, UK
Expire: 2014-01-04
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| Posted: Tue Nov 04, 2014 4:37 am Post subject: |
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peterqd wrote:
I was going to say that the black trim to the rear of the aluminium aperture ring looks like it might unscrew, similar to the Meyer
Domiplan, but then I noticed the stop-down button is in a notch which would prevent that. Sorry I can't help more.
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mo
Joined: 27 Aug 2009
Posts: 8979
Location: Australia
Expire: 2016-07-30
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| Posted: Tue Nov 04, 2014 10:00 pm Post subject: |
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mo wrote:
It still may unscrew, as it looks very much like the Pancolar 2/50 rear end which has the stop down button and unscrews.
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Moira, Moderator 
Fuji XE-1,Pentax K-01,Panasonic G1,Panasonic G5,Pentax MX
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calvin83
Joined: 12 Apr 2009
Posts: 7555
Location: Hong Kong
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| Posted: Wed Nov 05, 2014 3:21 am Post subject: |
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calvin83 wrote:
I have not idea how to strip it down. What I know this lens is specially made for Pentacon Super SLR.
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peter pan
Joined: 04 Nov 2014
Posts: 3
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| Posted: Thu Nov 06, 2014 9:03 am Post subject: |
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peter pan wrote:
| peterqd wrote: |
I was going to say that the black trim to the rear of the aluminium aperture ring looks like it might unscrew, similar to the Meyer
Domiplan, but then I noticed the stop-down button is in a notch which would prevent that. Sorry I can't help more. |
i agree with this theory. the big bottom ring might be unscrewed. i tried, but it dont move at all.....rusty or stuck? Pls help me more!
but maybe the aperture ring can be taken out for first step, then we could see small screws on the TAB of the big rear ring. |
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kenny12
Joined: 12 Nov 2014
Posts: 1
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| Posted: Wed Nov 12, 2014 11:24 am Post subject: |
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kenny12 wrote:
Greetings from Australia, I've got a very similar lens that I just repaired today, the back just unscrews, you will have to put some force as it is held onto the thread by two small dabs of glue.
what makes it a limited edition? mine looks very similar to yours but it does not have the same writing on the front.
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calvin83
Joined: 12 Apr 2009
Posts: 7555
Location: Hong Kong
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| Posted: Wed Nov 12, 2014 12:33 pm Post subject: |
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calvin83 wrote:
| kenny12 wrote: |
Greetings from Australia, I've got a very similar lens that I just repaired today, the back just unscrews, you will have to put some force as it is held onto the thread by two small dabs of glue.
what makes it a limited edition? mine looks very similar to yours but it does not have the same writing on the front.
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