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sirslak
Joined: 05 Aug 2008
Posts: 13
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 Posted: Thu Jan 22, 2009 9:32 am Post subject: Pentacon auto 4/200 MC aperture |
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sirslak wrote:
I just got myself a Pentacon auto 4/200 MC lens (see bottom picture on http://www.praktica-users.com/lens/mlenses/morp4_200.html) for €8,-.
Unfortunately, contrary to the seller's story the aperture is stuck. Does anybody know the best way to get to the aperture of this lens / get the aperture out?
I was by the way pleasantly surprised to find an auto/manual switch for the aperture. |
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aoleg
Joined: 22 Feb 2008
Posts: 1387
Location: Berlin, DE
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| Posted: Tue Jul 07, 2009 1:06 am Post subject: |
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aoleg wrote:
Got mine for 8 GBP, same problem. Blades do move sometimes, but they are erratic. Stuck blades seem to be a weak point of this lens.
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cheve
Joined: 31 Mar 2009
Posts: 182
Expire: 2011-12-06
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| Posted: Tue Jul 07, 2009 1:33 am Post subject: |
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cheve wrote:
hi,
may be this one help http://forum.manualfocus.org/viewtopic.php?id=8713
good luck, |
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aoleg
Joined: 22 Feb 2008
Posts: 1387
Location: Berlin, DE
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| Posted: Tue Jul 07, 2009 2:46 am Post subject: |
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aoleg wrote:
That one is for a pre-set Pentacon, a different beast altogether. Mine is Auto (with six blades).
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sichko
Joined: 20 Jun 2008
Posts: 2475
Location: South West UK
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| Posted: Tue Jul 07, 2009 9:29 pm Post subject: |
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sichko wrote:
If your lens is similar to the Pentacon auto 2.8/135 then this link may help...
http://forum.mflenses.com/pentacon-auto-2-8-135-partial-disassembly-and-cleaning-t9836,highlight,pentacon+disassembly.html
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aoleg
Joined: 22 Feb 2008
Posts: 1387
Location: Berlin, DE
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| Posted: Thu Jul 09, 2009 4:57 am Post subject: |
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aoleg wrote:
Yep, that one looks similar! I am afraid I lack the skills required though  I could clean and lubricate Jupiter-6 focusing ring, and to the same with Jupiter-37, but those are way simpler mechanically.
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Denis photos
Joined: 24 May 2012
Posts: 1
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| Posted: Thu May 24, 2012 12:23 am Post subject: Re: Pentacon auto 4/200 MC aperture |
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Denis photos wrote:
I know this is 4 years late post but I registered just to say that I managed to repair it myself.  I will upload result on Saturday. My Pentacon 4/200 auto MC was stuck to f4 when I bought it. So, I got it for 1/3 prize and repaired it so now works fine. Solution is really simple. After cleaning small aperture "razors" you just need to adjust lever which is attached to the first ring of plastic from the back of lens. |
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