8PCSSet 3571012152030mm Lens Adapter Ring Extension Tube Astronomical Telescope Accessory black
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Feature: 1. Easy to install, perfect replacement for the old or damaged one, reliable to use. 2. Made from high quality aluminum alloy, which is wear?resistant and not easy to damage. 3. Using fine workmanship CNC technology, the accuracy is higher, durable. 4. The female thread specification of the interface is M42x0.75mm, the male threadspecification is M42x0.75mm. 5. Various sizes of 3mm5mm7mm10mm12mm15mm20mm30mm are suitable for different models. Specification: Item Type: Lens Extension Tubes Material: Aluminum Alloy Color: Black Product Size: Approx.3mm 0.12in, 5mm 0.20in, 7mm 0.28in, 10mm 0.39in, 15mm 0.59in, 20mm 0.79in, 30mm 1.18in, 12mm 0.47in Application: Extend the focal length of the primary mirror of the astronomical te
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