M42 To M42 Helicoid Adapter Adjustable Focusing Accessory For Macro Photography

Feature: \n 1. This focusing helicoid tube is made of good metal, sturdy and durable, equipped with standard M42 mount\n2. The length of this helicoid tube is adjustable, it offers a distance for lens focusing adjustment, easy to use\n3. This helicoid tube is useful for those lenses without focus ring\n4. It could be used as macro barrel and offers fine focus control for macro photography\n5. It will be better when you use it with filter adapter together \n\nSpecification: \n\nFeature: \n\n--\n\nThis focusing helicoid tube is made of good metal, sturdy and durable, equipped with standard M42 mount. \n\n--\n\nThe length of this helicoid tube is adjustable, it offers a distance for lens focusing adjustment, easy to use. \n\n--\n\nThis helicoid tube is useful for those lenses without focus ring. \n\n--\n\nIt could be used as macro barrel and offers fine focus control for macro photography. \n\n--\n\nIt will be better when you use it with filter adapter together. \n\nSpecification: :