I just received a used lens on approval (a Fujinon 250W f6.7 in a chrome ring Copal 1 shutter, FWIW) and noticed a light coating of oil on much of the aperture blades. They move smoothly, and the shutter blades are clean and dry. I've never noticed this on any other lens I've owned or used.
Is it a problem, or likely to create one?
Thanks for your help.
Henry
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