Haoge Macro Focus Lens Mount Adapter Built-in Focusing Helicoid for M42 42mm Screw Mount Lens to M42 42mm Screw Mount Camera 12mm-17mm

Manual Lens Adapter with Helicoid Macro Tube for M42 42mm Screw-Mount Lens to M42 42mm Screw-Mount Camera Body.. The macro function of this adapter provides a focusing helicoid that will increase the lens-to-sensor distance, allowing for closer focusing than normally allowed by the lens itself.. This means you can now get macro performance without needing to switch to a specialized lens and you will retain all the normal benefits of your optic when the macro function is not in use.. It allow you to take close up/macro image more easier when full extended. It can focus infinity when closed of course.. The length of this Helicoid tube 12mm (min) to 17mm (max), it offers a total of 5mm movement distance for lens focusing.