Fotodiox Pro Lens Mount Adapter - Yashica 230 AF SLR Lens to Nikon F Mount SLR Camera Body with Built-In Aperture Control Dial Fotodiox Pro Grade Adapter, Premium Craftsmanship No Play Adapter, Infinity focus allowed Made from Heavy Duty Brass with Steel Finishings Built-in 1.4x Multi-Coated Focusing Correction Lens and Aperture Dial which Allows Aperture Control 24 Month Manufacturer Warranty