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Helios 77M-4 50/1.8 stiff focus ring
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PostPosted: Sun Feb 08, 2015 8:18 am    Post subject: Helios 77M-4 50/1.8 stiff focus ring Reply with quote

Hi all,

I have vintage lens Helios 77M-4 from old analog Zenith. The lens is very good, sharp, with nice bokeh, but my problem is the focus ring. It's very stiff at all range.
Can you give me any idea what to do in this case ?
I am looking for disassembly instruction, but without result.

Ty for your help.


Last edited by metatron123 on Tue Feb 10, 2015 5:39 am; edited 1 time in total


PostPosted: Sun Feb 08, 2015 4:13 pm    Post subject: Re: Helios 77M-4 50/1.8 stiff focus ring Reply with quote

metatron123 wrote:

I am looking for disassembly instruction, but without result.

Your Helios 77M-4 is probably very similar to common 58/2 44M-4 version.

https://www.youtube.com/watch?v=oG3KkFMlpaE


PostPosted: Mon Feb 09, 2015 12:49 am    Post subject: Reply with quote

The lube you use will have a huge effect on the feel of the focus ring, you also want to avoid grease that separate into oil, as the oil will get everywhere, which means you'll be opening up again to clean out the oil.

I usually make marks where things line up when at infinity, and again with the helicoid where it comes apart, there 3 parts to the helicoid, the inner, outer, and the fine thread, the fine thread needs its own marks and count the turns to remove it.
I use solvent and a toothbrush to clean the helicoid, followed with soap and water with the toothbrush, I also clean the focus ring and aperture ring while I'm at it.

Go easy on the lube, excess will only get pushed out.


PostPosted: Mon Feb 09, 2015 6:49 pm    Post subject: Re: Helios 77M-4 50/1.8 stiff focus ring Reply with quote

y wrote:

Your Helios 77M-4 is probably very similar to common 58/2 44M-4 version.

https://www.youtube.com/watch?v=oG3KkFMlpaE


This is my problem... maybe " probably very similar " ... Sad


PostPosted: Mon Feb 09, 2015 11:38 pm    Post subject: Re: Helios 77M-4 50/1.8 stiff focus ring Reply with quote

metatron123 wrote:
y wrote:

Your Helios 77M-4 is probably very similar to common 58/2 44M-4 version.

https://www.youtube.com/watch?v=oG3KkFMlpaE


This is my problem... maybe " probably very similar " ... Sad

Russian lenses only seem to get changes to make the construction more simple.
If you get stuck, post some pictures, we'll help you all we can.
Or you can send it to someone who will charge you about what the lens is worth to clean and lube it.