Used Canon EF 50mm f/1.2L. Everything with this lens functions just fine (glass is clean, mounts and functions perfectly, normal wear and tear, etc), but the plastic filter ring on the front has a small half-inch chunk cut out. Lens cap and hood still function normally. Filters thread on and stay in place, but obviously not quite as smoothly as a perfect, new thread. Marking this as "poor" and selling at a discount because of the notch, but really the lens is fine if you don't mind the slight defect.