Color Skopar 35/2.5 repair question

[Perks]

Hi folks,

My beloved lens is jammed. The focus won't move all the way, i suspect some sand as this occured on the beach.

I have been able to move across the full range but then it jams again and now will only move aprox 70cm - 2m.

Any advice as to a remedy?
I have ordered a lens spanner as nothing I could disassemble by hand seemed of use.

Cheers

 

[DHK]

Take pictures and show us

 

[Ko.Fe.]

I took PII focus block apart. To re-lube and fix loose focus tab.
I was able to put it back.
I'm using FSU caliper and 20L wine bottle lock to deal with lens rings.

 

[Perks]

Take pictures and show us

I don't understand, of what?

 

[Perks]

I took PII focus block apart. To re-lube and fix loose focus tab.
I was able to put it back.
I'm using FSU caliper and 20L wine bottle lock to deal with lens rings.

That's good, gives me some confidence.
Thanks

 

[Peter Jennings]

Which version? There are versions of this lens in LTM and M mount. They are constructed differently. I had trouble taking apart an early chrome LTM that I had which had stiff focus. Never did get it completely disassembled.

 

[Perks]

Which version? There are versions of this lens in LTM and M mount. They are constructed differently. I had trouble taking apart an early chrome LTM that I had which had stiff focus. Never did get it completely disassembled.

It's an M mount, P2.

I can hear a rattle that is the cause as I can sometimes free the focus when I tip it.

 

[DHK]

I don't understand, of what?

Agreed, poor language. I meant when you fix it, document it, please.

 

[Perks]

Agreed, poor language. I meant when you fix it, document it, please.

Thats a good idea, I will!

 

[Peter Jennings]

Sounds like an internal screw may have come loose. Sorry I can't be of much help, but good luck!

 

[Perks]

Sounds like an internal screw may have come loose. Sorry I can't be of much help, but good luck!

Peter, you were correct and thanks for the well wishes

 

[Perks]

It was indeed a lose screw and was easily fixed.
I'll describe the process, please excuse my ignorance of correct terminology.

First, I loosened the rear element collar by hand.
I removed the collar, rear element and a shim.

2019-02-08_08-14-30 by illformation, on Flickr

Then I used a lens spanner to unscrew a collar that joins the rest of the elements and the focusing mechanism.


20190207_222237 by illformation, on Flickr

2019-02-08_08-18-27 by illformation, on Flickr

Turning the focusing mechanism over I could that in fact two were not in place, I think you can see one of them in this photo at 3 o'clock, I have no idea what happened to the second screw. I didn't see the loose screw at first and it dropped out as I inspected and moved the mechanism.

[/url]20190207_222735 by illformation, on Flickr[/IMG]

I replaced the screw as pictured below and reassembled.
It seems fine.

[/url]20190207_223445 by illformation, on Flickr[/IMG]

I hope this helps others.
Cheers,
Andrew

 

[Peter Jennings]

Good job! It's always a nice feeling when you can fix things yourself.

 

[Perks]

Good job! It's always a nice feeling when you can fix things yourself.

Yes, thanks, very satisfying.
however I do wonder what happened to the other screw....

 

[Ko.Fe.]

Was this lens purchased new?