Screw beside focusing finder

[cosmonaut]

On my IIIa there is an adjustment for the focusing finder. I am sure you all know what it is. But mine keeps workig loose. I am afraid a some point it will come out. Any ideas to keep it secure? Thread lock or something?

 

[John Shriver]

I presume you're talking about the pin that goes in the left side, and provides the peg for the slot in the focusing finder lens tube. There may just be too much lube there, as there needs to be some lube where the tube of the rear lens slides in and out.

Real thread lock would probably be too strong. The actual screw tip is rather small, maybe 1mm diameter. Maybe a bit of Pliobond?

Or perhaps a very thin fiber washer, to serve as a lockwasher?

 

[cosmonaut]

I presume you're talking about the pin that goes in the left side, and provides the peg for the slot in the focusing finder lens tube. There may just be too much lube there, as there needs to be some lube where the tube of the rear lens slides in and out.

Real thread lock would probably be too strong. The actual screw tip is rather small, maybe 1mm diameter. Maybe a bit of Pliobond?

Or perhaps a very thin fiber washer, to serve as a lockwasher?

Thanks and yes that is what I am refering to.