<ul> <li>Female side - smooth, diameter 70.65 mm</li> <li>Male side - M65x1 male thread</li> <li>Weight - 65g</li> </ul> <p>This adapter allows using projection lenses that have about 70.5 mm barrel diameter (like Schneider Cinelux) on Chinese focusing helicoids with M65x1 screw thread. Such setup is great for portrait and macro shots.</p> <p>The adapter is secured by 3 screws.</p> <p>Made of light alloy, anodized to black color and laser engraved.</p> <p> </p>