Macro Focus Lens Adapter with Built-in Helicoid for M42 Mount

This macro focus lens mount adapter allows you to attach M42 42mm screw mount lenses to cameras with the same mount. It features a built-in focusing helicoid, enabling precise manual focus adjustments. The adapter provides a focusing range from 17mm to 31mm, making it suitable for close-up photography. Its sturdy construction ensures durability and reliable performance. The design maintains the lens's original functionality, allowing for detailed macro shots without additional electronic components. This adapter is ideal for photographers seeking to expand their creative options with manual focus macro photography.