1. Focusing Range: The focusing range is 17‑31mm, providing a 14mm adjustment distance for lens focusing.
2. Extinction Treatment: The inner wall of the focusing cylinder is subjected to extinction treatment to avoid the impact of reflected light on the imaging.
3. Great Choice: It's the great choice for zooming in or changing lenses, providing a focusing system for lenses that don't have a focusing system.
4. Premium Materials: Made of aluminum alloy, strong and durable, black anodized for longer life.
5. M65 Threaded Interface: Adopt general M65 threaded interface, strong versatility and convenient transfer.

Specification:
Item Type: Focusing Helicoid Adapter
Material: Aluminum Alloy
Colour: Black
Focusing Range: 17-31mm
Interface: Male Port: M65 Threaded Mount
Female Port: M65 Threaded Mount

Package List:
1 xFocusing Helicoid Adapter