Very loose Copal 0 aperture lever

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MTGseattle

MTGseattle

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You want tacky- rub between your fingers to see if it maintain tack. And you want no ready separation of oil. This is something your own experience with it might answer, if you have seen oil seeping out of greased area or such. I've seen Phil Woods separate over time in bicycles.

Moly is probably not the best. Maybe super tacky, start small, operating lever a bit to be sure to spread.

It occurs to me that there might be a 'better' way, although the above will work fine. More if you over-apply. I don't know the Copal exactly. There's a chance that the whole metal disk can be removed. You need to remove the lens group and see if the inner silver disk is just a washer. On many shutters, there will be three small screws with wide heads that hold the aperture disk in place, creating three 'tabs' on the inside of the ring. In most cases, this disk can be simply lifted away and replaced without issue. If you end up going this way, I'd recommend posting a photo of the back once you get the three screw heads visible. Soomeone might see something that says leave it alone! With aperture blades, disassembly for re-assembly is a long process, probably having you learn more about shutters than you want to.

Dan, This is the process that a technician described to me as well. One then applies 3 "dots" of the grease. I am likely spending way too much time thinking and reading about this. My paramount concern is for separation and that it does not happen and lead to oil or another component getting where it shouldn't.
 
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MTGseattle

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OK. I learned to stop worrying and love the bomb.

Fujinon W 150mm f5.6 is fixed. Aperture retention ring (has 3 tabs that register within another part of the shutter) removed and cleaned, Aperture selection lever/ring removed and cleaned.
Aperture selection ring reinstalled (has 2 tiny brass? bushings that correspond with 2 tiny pins)
3 toothpick end dots of the lucas red&tacky nlgi #2 grease applied. (I placed them in alignment with the 3 tabs simply to focus the job)
Retension ring reinstalled and lens reinstalled onto lens board.
It seems to work really well, and is not loose.

Fujinon C 300mm is next on deck for the same process.
 

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Aperture ring tension on the Copal 0 shutter is something that I have run into many times. Mostly they are quite loose. My solution is to remove the spring tension ring held on with three screws that hold on the aperture ring and then very carefully bend each securing hole a very tiny amount and that puts more tension on the aperture ring. Easy enough to find just the right amount of friction. I really avoid any grease on shutters other than tiny amounts of moly lube in the appropriate places. Of course, I always ask my client first if they would like the aperture ring to be a tiny bit tighter.
 
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