dr summicron focus stiff

[mojobebop]

i have come into possession of a dr 50 summicron.
when the f stops are above 5.6 the focus is incredibly hard to turn, (after 5 ft).
when f stops are f 16 or 11, it is pretty much normal.

i'm wondering who would be best to fix this, and what the cost might be.
also what might cause this.

thanks,

 

[kknox]

Youxin Ye at wye7@yahoo.com can fix it with a CLA on the lens he is not to expensive. He will not be back in town until June 28th. I send him lots of my stuff hes great.

 

[Franklin Pangborn]

Lack of lubricant, dried lubricant, or some physical damage to the threads.

 

[wintoid]

Even when not mounted?

 

[mojobebop]

focus

focus

Even when not mounted?

yes, still stiff.
wide open.
shut down all the way it's fine.
as you shut the diaphram down it gets easier to focus.
so the mechanism must be connected somehow.

 

[mojobebop]

repair

repair

Youxin Ye at wye7@yahoo.com can fix it with a CLA on the lens he is not to expensive. He will not be back in town until June 28th. I send him lots of my stuff hes great.

can't seem to find contact info for y. ye.
that link does not provide. any other info?

 

[Harry Lime]

Sounds like it needs a cleaning.

http://www.lhsa.org/resources/repair_services/default.aspx

 

[mojobebop]

?

?

Sounds like it needs a cleaning.

http://www.lhsa.org/resources/repair_services/default.aspx

may go with dag.
any idea how much dr's run to fix?
2-300?

 

[mojobebop]

redux

redux

may go with dag.
any idea how much dr's run to fix?
2-300?

any ideas from anyone who has had a dr cla'd?

 

[Fred R.]

Gerry at Kindermann told me it's not a simple cla because of the dual focusing. I half remember him quoting me $175 for the job.

 

[mojobebop]

done

done

thanks for advice all.
have sent it to dag for fix, & cla.

 

[Jim Evidon]

Send it to DAG (Don Goldberg). I sent him my M4P with the 50mm DR Summicron for adjustment. He was fast, efficient and not terribly expensive.

 

[pulo]

Actually you can lubricate the focusing mount by yourself. There are three screw holes in the barrel designed for injecting lubricant. And you can also screw the lens head (which contains all elements) off the focusing mount and lubricate the focusing mount from both front and rear sides.

I lubricated mine last week using the Super Lube lubricant
http://www.micro-tools.com/store/item_detail.aspx?ItemCode=51010
and now it is so smooth that I can focus even using one finger.


As for the aperture ring/blade, it hides inside the lens head and is not that easy to hack. Sending it for a CLA would be a better idea....