In regards to aperture rings, my 50mm f3.5 Macro has a strange symptom that
its had since I got it second hand. I dont know whether its normal behaviour
and someone else may be able to shed some light.
When the lens is focussed at infinity the aperture goes both ways ie towards
3.5 and 22 with equal ease. however when extended out and focussed at .23m
it has the strange symptom of going towards 22 easily but having definite
resistance going back to f3.5.
Is this normal? Or does my lens need the grease job too?
> > You can just screw off the front ring that says "Olympus
OM-System
> > Zuiko MC(?) Macro 1:3,5 f=20mm." Next pull the aperture ring straight
off.
> > Then apply some grease (no idea what type...anybody?) to the exposed
surfaces.
>
> That's more or less what you need to do. Chances are that the grease
around
> the aperture ring has solidified and is preventing it from turning. Use a
> rubber stopper to twist the front part of the lens off, it's just a big
> retaining ring. The aperture ring should then easily come off. You will
> then see a little pin sticking out from the barrel. Try moving that pin,
> it should move freely and close the aperture. If it doesn't then you have
> other problems and it's best to get the lens CLA'd. If it does move
freely,
> just clean up the grease on the aperture ring and re-lube it using an
> appropriate grease.
> -mark
>
>
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