Item Descriptions:
-Suitable for change the lens mount, allows mounting of M39 threaded lenses onto M42 thread mount camera bodies or adapters.
-The internal thread (female) is 39x1mm, the external thread (male) is 42x1mm, and the diameter is 50mm.
-Designed for manual focus lens and camera system integration, enables thread conversion without affecting optical alignment or flange distance
-Made of aluminum alloy for durability and corrosion resistance.
-Easy installation, can be replaced directly without adjustment, great compatibility and high reliability.

Package:
1x M39 Female to M42 Male Camera Lens Adapter Ring

Item Specifications:
Color:Black
Material:Aluminum Alloy
Internal Thread (Female):39x1mm
External Thread (Male):42x1mm
Diameter:50mm