M42 To M42 12-17mm Adjustable Focusing Helicoid Adapter Macro Extension Tube For Lenses

Get into macro photography with this handy M42 lens adapter.

It's a brand new, adjustable focusing helicoid tube.

It screws into your camera's M42 mount on one side, and your M42 lens screws into the other.

You can adjust it from 12mm to 17mm in length, which lets you focus much closer than your lens normally would.

It's a simple, all-mechanical way to get into extreme close-up photography with your existing vintage or modern M42 screw mount lenses.