Cheap adapter lcd, Buy Quality adapter mp3 directly from China adapt marketing Suppliers: M52 to M42 Mount Focusing Helicoid Ring Adapter 12 - 17mm Macro Extension Tube
This tube useful for lens without focusing ring. And it can be use as macro extension tube. There is no electronic element in the adapter, aperture and focusing must be manually control.Specifications:Front mount: M52 screw mount female (M52 x 1mm)Rear mount: M42 screw mount male (M42 x 1mm)Length: 12mm to 17mm (5mm movement distance for focusing)Focus: manuallyMaterial: aluminium alloyPackage included:1 x focusing helicoidBrand new and unused