On Tue, 24 Apr 2001 Johnsonpa@xxxxxxx wrote:
> 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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