An honest seller tells me his lens (90mm tele elmarit 2.8) has appearance of oil on the aperture blades but says this is irrelevant bcs. "the aperture is not spring loaded" on a rangefinder.
What does this mean and is he correct? If the price is right is there any reason to avoid such a lens?
He says there may be a slight haze on an inner element also, seen thru a lupe. Could this be caused by the oil? How the heck does oil get in there?
Should I stay away from this even if it's a bargain price?
Anyone have an idea how difficult/expensive it is to have one of these cleaned internally?