57mm clamp to M65x1 male thread adapter for helicoids

• Front side - 57mm inner diameter
• Rear side - M65x1 male thread
• Weight - 35 g

This adapter allows using projection lenses that have 57 mm barrel diameter on Chinese focusing helicoids with M65x1 screw thread. Such setup is great for portrait and macro shots.

The adapter is secured by 3 set screw (installed) with an allen key (included).

It has intermediate flat metal spring that prevents damage of the lens barrel by set screws.

Machined from light alloy, anodized to black color and laser engraved.