I just picked up a Olympus Pen-F 38/1.8 on auction for a really good price. The lens arrived and it is absolutely pristine You'd be hard pressed to tell it from new. I've had a few of these lenses and I can honestly say I have never seen one in such nice condition...BUT the aperture blades are slow to retract (looks like oil on them). Normally I would send it back but as I said I have never see one this nice (body, glass, lack of dust ) I got to thinking that it really wouldn't have much effect on my shooting considering how adapted lenses work on my NEX. What would you do? I got it for a good price. The seller didn't mention oil on the blades. Is it something I might be able to fix myself? Should I even bother? I'm open to suggestions.