Telescope Spacer Rings Photography Extension Tubes Black Aluminum Alloy 8Pcs Set 3 5 7 10 12 15 20 30Mm Lens Ring Extension Tube Astronomical Telescope Accessory

1. Easy to install, replacement for the old or damaged one, to use.2. Made from aluminum alloy, which is wear‑resistant and not easy to damage.3. Using fine workmanship CNC technology, the accuracy is higher, .4. The female thread specification of the interface is M42x0.75mm, the male threadspecification is M42x0.75mm.5. Various sizes of 3mm/5mm/7mm/10mm/12mm/15mm/20mm/30mm are suitable for different .Specification:Item Type: Lens Extension TubesMaterial: Aluminum AlloyColor: BlackProduct Size: Approx.3mm / 0.12in, 5mm / 0.20in, 7mm / 0.28in, 10mm / 0.39in, 15mm / 0.59in, 20mm / 0.79in, 30mm / 1.18in, 12mm / 0.47inApplication: Extend the length of the primary mirror of the astronomical telescopeExtinction Treatment: Internal with extinction threadInterface Female Thread Specification: M42x0.75mmInterface Male Thread Specification: M42x0.75mmHow to Use:1. Remove the objective lens.2. Connect the telephoto tube to the eyepiece and the objective lens.3. Then connect the objective lens.Package List:1 x 3mm Extension Tube1 x 5mm Extension Tube1 x 7mm Extension Tube1 x 10mm Extension Tube1 x 12mm Extension Tube1 x 15mm Extension Tube1 x 20mm Extension Tube1 x 30mm Extension TubeNotice:1. Please allow 1‑2in error due to manual measurement. Thanks for your understanding.2. Monitors are not calibrated same, item color displayed in photos may be showing slightly different from the real object. Please take the real one as standard.

• Material ---- Lens Extension Tubes is made from premium aluminum alloy, which is wear‑resistant and not easy to damage. Using fine workmanship CNC technology, the accuracy is higher, .
• Features ---- The female thread specification of the interface is M42x0.75mm, the male threadspecification is M42x0.75mm.
• Easy Installation ---- Effortlessly replace old or damaged parts with this aluminum alloy lens extension tube. Its wear-resistant material ensures long-lasting reliability.
• How to Use ---- 1. Remove the objective lens. 2. Connect the telephoto tube to the eyepiece and the objective lens. 3. Then connect the objective lens.
• Diverse Sizes ---- Choose from various lengths, including 3mm, 5mm, 7mm, 10mm, 12mm, 15mm, 20mm, and 30mm, to suit different . Versatility at your fingertips.