M42 Glass Adapter Focus Infinity For M42 Screw Lens to Nikon D6 D5 D4S D4 D3S
D6 D5 D4S D4 D3S D3X D3 DF. This M42 to Nikon adapter is made of aluminum, with built-in correctional glass to allow Infinity focus. Adapter for M42 Lens to Nikon Body. M42 Screw Thread Mount Lenses.