Do not have an M mount camera to test so I cannot be sure of the impact. Glass has no scratches or fungus. Aperture blades are clean move into place properly.
The item "Leica M Mount 5cm f/2.8 Elmar Collapsible Ernst Leitz GmbH Wetzlar" is in sale since Sunday, May 10, 2020. This item is in the category "Cameras & Photo\Lenses & Filters\Lenses". The seller is "wbl-photo" and is located in Dayton, Ohio. This item can be shipped worldwide.