difficulty of relubing a collapsible summicron?

aizan

aizan

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Well, my collapsible Summicron arrived. It was quite a bargain and the only thing really wrong with it is jerky focusing past the middle of the scale (a few light scratches and a bunch of cleaning marks aren't going to stop me!). The seller didn't note that and I even asked how the focusing was, tisk tisk.

Anyhow, how difficult is it to relube the focusing helical? What tools and supplies do I need? I've got an S.K. Grimes spanner and light Nyogel in my shopping basket. If I were to clean off the glass, should I get one of those suction cup things as recently seen on the Kiev Survival Site (http://www3.telus.net/public/kaylalyn/Jupiter-8 dismantle.html)? Are there any special considerations to cleaning the interior surfaces, as opposed to the exterior?
 
one more thing: is there a deeper rear cap for collapsible screwmount lenses? i would've thought they made lots of them, but i can't find any.

nevermind, it looks like CQ has em. doh!
 
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Try the cap from a can of Kodak film. Denis suggested this, and it fits perfect on my Jupiter-8. You only need to cut out the inner lip of the lid.
 
I wish I had one in front of Me! REALLY! On my Elmar this is simple, the helical is exposed and you can just squirt a little lube into it. Can you get to the Helical from the inside?

On my Nikon RF Helicals the jumpy focus was cured by cleaning dirt and old lube out of them with Ronsonol. After cleaning, I did not use any lubricant, as stated in the original repair book. Isopropyl Alchohol worked great on my Retina's.
 
EVERYBODY YELL AT BRIAN NOW! I used a Little sewing machine oil on some lenses, not the Elmar which does not need it. I used some on Oscar's J9 which really helped it out. It went from unscrewing from the camera to a "decent" movement.I also used some on my Nikkor 10.5cm F2.5 in LTM.

Hey, it worked! However, the Mechanical Engineers at work inform me that the newer libricants containing teflon(?) or similar substance is a mriacle lube that I should try. i will look into it further.
 
ok. I SHOULD HAVE TAKEN PICTURES, BUT THIS HELICAL THING IS PRETTY SELF EXPLANATORY, EVEN TO ME, WHO HAS NO EXPERIENCE IN LENS REPAIR OR GENERAL MECHANICAL TINKERY.

ahem, so yeah, it's gunky grease. i don't have any so i just put it back together. no spanner required, just the right size screwdriver. yay =)

sewing machine oil? i bet i have some...
 
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What I found out is the sewing machine oil turns the dry gunky grease into viscous (sp?) gunky grease. It works well enough, unless there is a bunch of dirt in there. What I did with the Nikon RF Helicals: put ronsonol (lighter fluid) into the back of the helical (shutter on "T"), worked the mechanism, the dirt accumulated on the exposed part of the helical, swabbed it off with a Q-tip. The same should work on the exposed helical of the Summicron.
 
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