This 13.5cm f4.5 Goerz Dogmar is an old lens: just about 100 years old, based on serial number. And its still in great shape! The glass shows minor dust, nothing more nefarious; the Compur shutter is in good working order. Dont buy this if you want edge-to-edge clinical sharpness; do buy this if you want a classic, lower-contrast look. Covers 4×5, but dont expect a ton of movement. Includes retaining ring.