Specification Brand : QANYEGN BulletPoint1 : ALUMINUM CONSTRUCTION: Each tube in the Length Extension Tube Kit is made of high quality anodized aluminum for durability and resistance to wear and tear. The all-metal construction ensures long-lasting performance and stability. This rugged construction provides the precision necessary to achieve accurate image scales and the spacing required for reducers and field levelers. BulletPoint2 : VARIABLE COMBINATION OPTIONS: The Length Extension Tube Kit provides flexibility with multiple extension rings of different lengths. Users can combine 1, 2, 3, or all 8 extension rings ranging from 3mm to 30mm in height to achieve the desired spacing. BulletPoint3 : Eliminate unwanted light: The M48 threaded extension tubes in the Length Extension Tube Kit are precision engineered to minimize stray light and reflections. This ensures that unwanted light interference is eliminated, resulting in sharper, more vivid images. BulletPoint4 : ELIMINATE FOCUSING PROBLEMS: Our length extension tube kits feature M48 female and male threads to solve common spacing issues in astrophotography. By integrating these extension tubes, users can effectively solve focusing challenges and ensure clear, tight images even with varying focus lengths. BulletPoint5 : Available in a variety of lengths: Our length extension tube kits include extension tubes in heights of 3mm, 5mm, 7mm, 10mm, 12mm, 15mm, 20mm and 30mm. These varieties ensure compatibility with a wide range of astronomical telescopes and photographic devices. CompatibleDevices : Cameras IncludedComponents : 1 ItemName : 8 PCS M48X0.75 Length Extension Tube Kit, Telescope Extension Tube Set, Astronomical Extension Tube for Photography Telescope ItemPackageDimensions_Height : 6 centimeters ItemPackageDimensions_Length : 16 centimeters ItemPackageDimensions_Width : 10 centimeters ItemPackageQuantity : 1 ItemTypeKeyword : camera-lens-extension-tubes Manufacturer : QANYEGN Material : Aluminum ModelName : QANYEGNbgrzxp379a ModelNumber : QANYEGNbgrzxp379a MountingType : Tripod NumberOfItems : 1 PartNumber : QANYEGNbgrzxp379a ProductDescription : Item Type: focus Length Extension Tube Kit Material: Aluminum Alloy Gross Weight: 107g / 3.8oz Extension Tube Height: Approx.3mm / 0.1in, Approx.5mm / 0.2in, Approx.7mm / 0.3in, Approx.10mm / 0.4in, Approx.12mm / 0.5in, Approx.15mm / 0.6in, Approx.20mm / 0.8in, Approx.30mm / 1.2in Thread: M48X0.75 Use: for Astronomical Telescope Photography