Hello, It's Universal Adapter for Nikon J1.En li effect is screwed on the Nikon J1 and then all the C-mount can be fitted without problèmes.La quality is excellente.Cela lets put all the objectives directly on the Nikon 1: it calls for a target of any brand, then a Lens adapter / C Mount and screw it all on the Nikon 1 recess manual mode .The opening can be adjusted directly on the lens and Nikon J1 offers in manual mode beautiful bokeh.