With its interchangeable lenses, an excellent library of optics can be gathered, and this Linhof Lens Unit with a Schneider 180mm f/5.6 Apo-Symmar Lens is a superb addition.
Linhof sets the lens in its own precision-machined helical lens mount that allows for bellows-free focusing.
Its wide image circle covers the full 6x17 cm negative area and covers 53°, great for panoramic photography.