Schneider-Kreuznach Symmar 100mm f/5.6 This is a large format lens from Schneider. As the photos show, there is some minor dirt and dust. In the 7th photo, there appears to be a small coating blemish in the center of the rear element, but it's inside the lens, so it's difficult to assess. The aperture and shutter both function. Please understand that this is a used item before purchasing. It is also listed on Rakuma.