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How to adjust helicoid feeling of Voigtlander Color Skopar 35mm f/2.5 PII VM
Old 04-29-2019   #1
Shibayvng
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Unhappy How to adjust helicoid feeling of Voigtlander Color Skopar 35mm f/2.5 PII VM

I bought a used Voigtlander Color Skopar 35mm f/2.5 PII VM.
I feel its helicoid is very heavy and I would like to change the feeling to light.
So, I tried to disassemble it, but I can't do that because of which screw should be removed.
Please anyone teach me how to adjust helicoid feeling.



Last edited by Shibayvng : 04-30-2019 at 00:03. Reason: Add pictures
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Old 04-30-2019   #2
Ko.Fe.
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If lens of this age is tight, it might be something else.
This lens might be dropped before.

I disassembled, re-lujbed it and put it back some years ago.
I was using this thread to start.
https://www.rangefinderforum.com/for...d.php?t=106294

But first thing you could try is to drop watch
https://www.ebay.com/itm/Watch-Oiler...UAAOSwT4lWTKRp
oil on the focus helicoid and work it out to get distributed among threads.

I did it with Canon 50 1.8 LTM. It is very smooth after it.
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Old 04-30-2019   #3
Shibayvng
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Thanks a lot!
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Old 05-01-2019   #4
Shibayvng
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I need some advice.

I disassemble the lens and find out which helicoid's friction(viscousness) is heavy.
Please see the picture below.



I would like to change the grease between above helicoid.
Please tell me how to disassemble them.
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Old 05-01-2019   #5
Ko.Fe.
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Sorry, I did not made any instructions.
The trick is to make marks on corresponding parts and pictures how and where these marks were aligned.
Rotate focus to see what is holding it to have helicouds disconnected. Must be those plates on top.

Try to make screws holding them first and try focus.
It might become better. Then retight screws evenly.
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Old 05-01-2019   #6
retinax
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Take pictures at every step, from multiple angles, and mark the parts as KoFe says, so that you'll know how it goes back together, then attack these screws - if this is anything like the Voigtländer Ultrons I've opened, you need to remove them.
Finding the source of stiffness can be difficult, good luck!
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