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How to adjust infinity focus on a Pentacon 200/4?

 
 
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YureW




Joined: 12 Feb 2009
Posts: 45
Location: Trieste, Italy


PostPosted: Fri Feb 27, 2009 11:19 am    Post subject: How to adjust infinity focus on a Pentacon 200/4? Reply with quote

I've a pentacon auto 200/4, the six blades version. Taking some shots, two days ago, I noticed that it was impossible to focus to infinity: no problems with the adapter (all other M42 lenses focus properly).
Is there an easy way to fix it?
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kansalliskala



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Joined: 19 Jul 2007
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Location: Finland, Kisko


PostPosted: Fri Feb 27, 2009 11:24 am    Post subject: Reply with quote

Does it screw properly to the mount so that the upside is really up? If not - inspect the threads.
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Attila



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Joined: 24 Feb 2007
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PostPosted: Fri Feb 27, 2009 3:56 pm    Post subject: Reply with quote

Perhaps it was opened and not perfectly built again, if no problem with mount.
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YureW




Joined: 12 Feb 2009
Posts: 45
Location: Trieste, Italy


PostPosted: Fri Feb 27, 2009 5:55 pm    Post subject: Reply with quote

Thank you, boys.

Unfortunately, the lens is broken. Making a test, today, I felt a scratch while focusing. After, the lens focussed past infinity. I took it apart, and found a missing screw, two bended slides, a little disaster.
I'll try to repair it.
Fortunately, I have another 200, a Jupiter 21, and prefer this one.

One of the next purchases will b a 180, or something.
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horvlas



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Joined: 30 Dec 2008
Posts: 202
Location: Budapest, Hungary


PostPosted: Sat Feb 28, 2009 10:08 pm    Post subject: Reply with quote

Probably Attila's opinion is true. I have also Pentacon 4/200, but it focuses beyond infinity. Somebody had opened and not built up properly. I have turn one round plus or minus the whole lens group inside! I think.
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