Summaron 35 f3.5 help

[RemiG]

Hello from France! I manage a to find a summation with hazed for a a very cheap price. I tried to clean to a point in now stuck!
I manage to arrive this far but can’t figure out what the next step to free the front or back lens to clean.
Any ideas?

 

[Erik van Straten]

Hello from France! I manage a to find a summation with hazed for a a very cheap price. I tried to clean to a point in now stuck!
I manage to arrive this far but can’t figure out what the next step to free the front or back lens to clean.
Any ideas?

You'll need some flexiclamps, made by Nobbysparrow in Japan. Available on eBay.

 

[jc031699]

No flexiclamps will help there
If you see the thread I mentioned above, those are press fit innermost front and rear lens assemblies. I describe how I was able to get them out.

Step 10 here:

Leica Summaron 3.5cm f3.5 LTM lens optical unit CLA

I had a heck of a time getting this lens open and worked out, so thought I would contribute to the hive mind by describing the process. This is lens serial number 751928. Pretty sure it had not been opened or cleaned since it was made in 1953ish. I did not overhaul the helicoid, as it was...

www.rangefinderforum.com

 

[RemiG]

thanks for the support! So you basically heat the whole piece and then tap it to get the lens element out? No screwing or anything else ?
I’ll give it a try this evening

 

[Arnold Layne]

thanks for the support! So you basically heat the whole piece and then tap it to get the lens element out? No screwing or anything else ?
I’ll give it a try this evening

What jc031699 said. I didn't heated the block. Just tapped gently (a lot) on a hard surface and slowly came out.

 

[RemiG]

Thanks a lot it works perfect! No need to heat it!

 

[kenjim]

I could work a bit more in this. Still unsuccessful....:

1. I removed the tiny grub screw under the name plate. Unscrewed the front silver ring.
2. Removed the three screws to lift the aperture index ring.
3. The same with the two pins that holds the ring that operate the aperture. Careful with the two ball bearings.

And that's it. When I try to unscrew the rear retaining ring (wich requieres a lot of strength), the whole optical block rotate (dashed line). I'm stuck here.

View attachment 4837975

Hi,
I am trying to unscrew the first ring

I could work a bit more in this. Still unsuccessful....:

1. I removed the tiny grub screw under the name plate. Unscrewed the front silver ring.
2. Removed the three screws to lift the aperture index ring.
3. The same with the two pins that holds the ring that operate the aperture. Careful with the two ball bearings.

And that's it. When I try to unscrew the rear retaining ring (wich requieres a lot of strength), the whole optical block rotate (dashed line). I'm stuck here.

View attachment 4837975

Hi,
I am trying to repair a defective Summaron lens. After I removed the small screw from top the first ring (1) is still stuck. Is the ring (1) only screwed onto the thread?

 

[jc031699]

Hi,
I am trying to unscrew the first ring

Hi,
I am trying to repair a defective Summaron lens. After I removed the small screw from top the first ring (1) is still stuck. Is the ring (1) only screwed onto the thread?

Please post photos of which ring you are describing

 

[Erik van Straten]

I would use a bit of grease (vaseline), not oil. Oil will get anywhere, but vaseline stays where it is put.