<ul> <li>Front side - M53x0.75 male thread</li> <li>Rear side - M42x1 male thread</li> <li>Distance between flanges - 4 mm</li> <li>Weight - 15 g</li> </ul> <p>This adapter allows mounting a lens with M53x0.75 filter thread to M42 camera (Zenit, Praktica etc.) or macro tubes/bellows in reverse direction for macro purposes.</p> <p>Cheap and effective solution for your first steps into macrophotography world.</p> <p>Made of anodized aluminium.</p> <p> </p>