<ul> <li>Front side - 60 mm inner diameter</li> <li>Rear side - M65x1 male thread</li> <li>Weight - 24 g</li> </ul> <p>This adapter allows using projection lenses that have 60 mm barrel diameter 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 set screw (installed) with an allen key (included).</p> <p>It has intermediate flat metal spring that prevents damage of the lens barrel by set screws.</p> <p>Made of light alloy, anodized to black color and laser engraved.</p> <p> </p>