Description:This focusing helicoid tube is made of good metal, sturdy and durable, equipped with standard M42 mount

The length of this helicoid tube is adjustable, it a distance 12-17mm for lens focusing adjustment, easy to use

This helicoid tube is useful for those lenses without focus ring

It could be used as macro barrel and fine focus control for macro photography

It will be better when you use it with filter adapter together

Specification:Material: Aluminium AlloyColor: BlackOptions(Adjusting Length): 12-17mmSize/Diameter: Approx

5

8cm / 2

28inchPackage Includes:1 x Focusing Helicoid Adapter