Vivitar Pentax PK mount 500mm f8 lens with Fotodiox PK to m4/3 adapter. Front and rear caps included. Has usual soft spot that mirror lenses tend to have. Focus ring is smooth and lens has no fungus. Overall in great shape. Just trying to clear out a couple of legacy lenses. This is a really fun lens to play with! I have bought and sold here before, with a 100% rating. $85 paypal'd, including priority mail shipping in US.