<ul> <li>Front side - 70.65mm inner diameter</li> <li>Rear side - Pentax 67 mount</li> <li>Weight - 114 g</li> </ul> <p>This adapter allows using projection lenses that have about 70.5 mm barrel diameter (like Schneider Cinelux) on cameras with Pentax 67 bayonet mount. Such setup is great for portrait and macro shots.</p> <p>The adapter is secured by 3 screws (installed).</p> <p>This is longer (35 mm) version of the adapter. Shorter one (15 mm) is available as well.</p> <p>Made of anodized light alloy.</p>