Sell M42-M39 17mm-31mm Adjustable Focusing Lens Mount Adapter, Professional Accessories best price

Description: Manual Lens Adapter with Helicoid Macro Tube for M42 42mm Screw-Mount Lens to M39 39mm 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 17mm-31mm, (14mm movement distance for focusing) Specification: Front mount: M42 screw mount female Rear mount: M39 screw mount male Length: 17mm to 31mm (14mm movement distance for focusing) Focus: manually Material: aluminium alloy + copper Package Includes: 1 x Lens Adapter