10-15mm M42 To M39 Lens Macro Helicoid Adapter, 42mm Focusing Helicoid Extention Tube, 10-15mm Adjustable Fits M42 Lens

Features:
and
Focus manually.
Front mount: M42 screw mount female (M42 x 1mm).
Length: 10mm to 15mm (5mm movement distance for focusing
aluminium alloy.
Rear mount: M39 screw mount male (M39 x 1mm).

Specifications:
Front mount: M42 screw mount female (M42 x 1mm)
Rear mount: M39 screw mount male (M39 x 1mm)
Length: 10mm to 15mm (5mm movement distance for focusing)
Focus: manually
aluminium alloy.

Package Includes:
1 x Focusing Helicoid

Note:
Please allow 0-1cm error due to manual measurement. pls make sure you do not mind before you bid.
Due to the difference between different monitors, the picture may not reflect the actual color of the item. Thank you!