<ul> <li>Front side - 70.65mm inner diameter</li> <li>Rear side - Mamiya 645 mount</li> <li>Weight - 59 g</li> </ul> <p>This adapter allows using projection lenses that have about 70.5 mm barrel diameter (like Schneider Cinelux) on cameras with Mamiya 645 bayonet mount. Such setup is great for portrait and macro shots.</p> <p>The adapter is secured by screws (installed).</p> <p>Made of anodized light alloy.</p> <p> </p>