Hopefully it's just lubrication in the rings inside the lens mount.
Removing the mount is relatively easy.
Lots of 1.4's were sealed more agressively than they should have been,
making disassembly of the front end virtually impossible. The only way
to find out is to try. But I wouldn't wait -- if it's just in the rear
end, that can be cleaned easily, but once the lubrication migrates
inside, that could be trouble.
Fortunately OM's actively push the aperture lever closed (unlike some
brands, who's mechanism holds the aperture _open_, then allow the blades
to close when the shutter is fired). This shouldn't affect your
photography, at least until the aperture hangs up the camera!
Conrad Vogel wrote:
>
> I have a Zuiko 50/1.4 with slower than normal aperature blades. They
> aren't "snappy" like my 50/1.8, but they aren't "creeping" either.
>
> When I press the dof button and release it, the blades quickly close,
> but not nearly as quickly as my 1.8.
>
> Is this ok? Is there a possiblity of underexposure from the blades
> being ever so much slower to close & open back up? It seems like it only
> takes a little bit more pressure on the 1.4 dof button to close them as
> compared to the 1.8.
>
> thanks
>
> Corey
>
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