This is a Chinese product.

The focusing helicoid accepts a lens with Universal M42x1 thread mount, and fits a camera with Sony E mount.

It will be useful for adaptation of lenses or optical blocks that don't have their own focusing mechanism.

The build quality is good. Camera connection is snug and reliable.

Take note that the helicoid minimum length is 27mm, and the E-mountSony E-mount info and adapters flange focal distance is 18mm.

This means that your lens should have at least 45mm flange focal distance, otherwise it will not reach infinity focus.

If you are going to shoot macro photos or close-ups only, then you can attach a lens with shorter FFD.

The maximum suitable lens FFD is 18 + 59 = 78mm. Lenses with longer FFD will not be able to focus at all, unless you add some M42x1 extension rings.

More Information
Adapter Front Side	M42x1
Adapter Rear Side	Sony E-mount
Adapter Added Length	27mm
Material	Aluminium
Manufacturer	Pixco
Advantages	Design: Many of our products were inspired by customers, and have great application value. Material: Aluminium alloy 2024 (used in aviation and space industry). It is light and durable. Technology: Cutting from solid bars provides the highest possible product quality. Tolerances: A bit tight fit is better than too loose fit for imaging equipment.

M42x1 female thread to Sony E-mount focusing helicoid (27-59mm)

Design: Many of our products were inspired by customers, and have great application value.
Material: Aluminium alloy 2024 (used in aviation and space industry). It is light and durable.
Technology: Cutting from solid bars provides the highest possible product quality.
Tolerances: A bit tight fit is better than too loose fit for imaging equipment.