Bronica PS 80mm f2.8 Aperture Ring Stiff

Bobby Brewster

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Hi folks,

I know this could be asking how long is a piece of string but as above my recently acquired camera has the above lens with sitff aperture. It is moveable and at first I didn't really register how stiff it was but I am getting quite uncomfortable with it now. Is this normal? Sign of damage? Need for lubrication? It seems to work fine and the focus ring turns smoothly and easily. It mounts and dismounts easily so otherwise seems fine. Is there a DIY lubrication I can do?

Thank you all
 

OAPOli

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Also had this issue on my 80mm PS. The proper solution is to remove the aperture ring and clean the dried grease. But I put 1-2 drops of light oil under the ring, worked it a little bit, the problem went away.
 
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Bobby Brewster

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Thank you both.

Seems like it is fixable then. I'm wondering if the best idea is try the oil under the ring approach. Does anyone know if removing the aperture ring is a fairly tricky job?
 

koraks

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Usually removing the aperture ring isn't too difficult, but there's a tiny little ball bearing that is easily lost in the process. That, together with a tiny little spring is what makes the 'clicks' of the aperture stops.
If you choose to apply oil, make sure to use only the tiniest amount possible. Oil tends to evaporate (or at least part of it) and it tends to deposit all over the inner construction of the lens - including the glass surfaces.
 
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Bobby Brewster

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Hmmmm … I’m going to either live with it or take it to a repair shop.

Thank you for the information
 

hardly any color

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I had this with several bronica ps lenses, both aperture and focus rings. Apparently their grease did not age well. Sent mine to be serviced and all was well.
 

RalphLambrecht

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don't lubricate. Just keep moving it back and forth, and it will ease up with time. I may help to warm it up before moving but don't overdo that becauseit may create oi residue on the aperture blades.
 
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Bobby Brewster

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I'll give it some movement for a bit and if that doesn't work send it off for a service.
 
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