<ul> <li>Front side - 80mm inner diameter</li> <li>Rear side - M65x1 male thread</li> <li>Weight - 118 g</li> </ul> <p>This adapter allows using projection lenses that have about 80 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 screws. Flat spring protect a lens barrel from damage by the screws.</p> <p>Made of anodized light alloy.</p> <p>Known compatible lenses:</p> <ul> <li>Meopta 1.4/100mm</li> <li>Meopta 1.6/120mm</li> </ul>