M42 to M42 Mount Focusing Helicoid Ring Adapter 12-17mm Macro Extension Tube,Default NO5234

Feature:

Made of anodized aluminum, black finish, high quality, providing fine focus control for macro photography, made of lightweight alloy.

This tube useful for lens without focusing ring.  

It can be use as macro extension tube.

There is no electronic element in the adapter, aperture and focusing must be manually control.

Specifications:

Lens compatibility: M42 screw mount lens

Length: 12mm to 17mm (5mm movement distance for focusing)

Focus: manually

Material: Aluminium alloy

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