This M42/AI Lens Adapter Ring for M42 Lens (Converts to Nikon AI) is a helpful adapter for Nikon AI. It brings you more convenient to take more professional pictures. This adapter ring is not only a helpful accessory for camera to protect lens and improve artistic effect as well as prolong focus and increase wide angle, but also a practical article in photography. Made ofaluminum material, this ring is solid and durable. It ensures high definition and high-fidelity pictures when taking distant objects. It s really a practical and functional helper! You deserve it!<!--Features --><p>FEATURES</p><ul><li> Simple design is easy to install and dismantle</li><li> Compatible with Nikon AI SLR </li><li> Ensure high definition from the distance</li><li> Made of aluminum material, it is durable in use</li><li> The portable design is convenient to store and use</li><li> It is convenient to adjust camera angle </li></ul><!--Specifications --><p>Specifications</p><table width="100%" border="0" cellpadding="0" cellspacing="0"><tbody><tr><td width="131"> Material</td><td width="365"> Aluminum</td></tr><tr><td width="131"> Weight</td><td width="365"> 0.74oz / 20.9g</td></tr><tr><td width="131"> Color</td><td width="365"> Black</td></tr><tr><td width="131"> Dimensions</td><td width="365"> (2.09 x 2.09 x 0.35)" / (5.3 x 5.3 x 0.9)cm (L x W x H)</td></tr><tr><td width="131"> Compatible with</td><td width="365"> M42 Lens</td></tr></tbody> </table><!--Package Includes --><p>Package Includes</p><ul><li>1 x Ring </li></ul><!--Extra Info --><!--produts_compatibility -->