This is a very compact 135mm DKL lens and is perfect if you love the vintage lenses but want clear modern glass. The DKL mount was used by several German cameras, including the Bessamatic, Kodak Retina IIIs and Reflex SLRs. Adapters for modern systems are readily available.The lens shows little cosmetic wear. The aperture is dry and smooth. The focus is smooth. There is moderate haze on an internal element, which may cause some interesting effects in your images.The lens comes with caps in a beautiful leather case.