Feature:1. Adopts aviationgrade aluminum alloy material, CNC tightly processed, and the cover is anodized, which is lightweight, durable, and corrosionresistant.2. Can enhance the telephoto function, making the shooting focal length or magnification increased to 2 times the original.3. The lens is made of highquality highdefinition optical glass material and doublesided multilayer coating.4. The lens is good for shooting distant scenery, such as wild animals, concerts, bird watching, etc.5. Can be used with M42 lenses and used between SLR cameras and lenses.Specification:Condition: 100% Brand NewItem Type: Lens ConverterColor: BlackMaterial: Aluminum Alloy + Optical GlassBayonet Type: M42-0.75mm T2 bayonet.Package List:1 x 2x Converter1 x Front Lens Cover1 x Rear Lens Cover1 x Lens Storage Bag