M42 to M42 Adjustable Focusing Helicoid 17-31mm Macro Extension Tube Black

Description:

This focusing Helicoid tube is made with standard M42 mount.
You can use M42 screw mount lenses, such as Carl Zeiss or Pentax 42mm screw mount lenses, and even enlarger lenses.
The length of this Helicoid tube 17mm (min) to 31mm (max), it offers a total of 14mm movement distance for lens focusing.
Easy to Install:Mount the Helicoid tube to your lens, and then the combination of lens and Helicoid tube to the camera.This Helicoid tube is useful for those lenses without focus ring.
It could be used as Macro barrel and offers fine focus control for macro photography.It will be better when you use it with filter adapter together.

Specification:

Material:Aluminum Alloy
Color:Black
Size:5.6*2cm
Suitable For:
Lens:M42 Mount Lenses
Cameras: M42 Mount Cameras
Settings:
Put red marks of the adapter and lens collar together.
Turn the adapter anticlockwise till the fixative click.
Mosty it will use Manual or AV mode.
Removing:
To remove the adapter you should unpress fixative pin and turn the adapter clockwise.

Package Includes:

1 Piece M42-M42 (17-31mm) Adjustable Focusing Helicoid Adapter

Note:

1. Although the lens will fit physically, automatic diaphragm, auto-focusing, or any other function will not operate correctly while using this adapter.
2. In this case "Stop-down mode" will need to be used when metering since the lens doesn't have the ability to have its apeture controlled by camera body.
3. You can shoot with manual mode or aperture priority mode.