2 Inch Telescope Eyepiece Extension Tube, 40mm M48 Thread Adapter for Astronomical Photography, Aluminum Alloy with Locking Finger Screws and Brass Compression Ring
Precision Fit Design: Our 2 inch telescope eyepiece extension tube features a precise M48×0.75 thread and 2 inch inner diameter to securely connect standard astronomical eyepieces, filters, and cameras — eliminating wobble and ensuring optical alignment stays true during long-exposure astrophotography or planetary viewing.
Dual Secure Fastening System: This extension tube includes both locking finger screws for quick, tool-free insertion of accessories and a brass compression ring that gently but firmly grips 2 inch eyepieces and photography filters — preventing slippage, scratches, or accidental drop without over-tightening.
Versatile Astronomy Use: Designed for amateur and intermediate astronomers, our telescope eyepiece extension tube works seamlessly with Dobsonian, Schmidt-Cassegrain, and refractor telescopes to fine-tune focus when using Barlow lenses, narrowband filters, or DSLR/mirrorless camera adapters — ideal for lunar imaging, deep-sky stacking, and solar system observation.
Lightweight & Durable Build: Made from high-grade anodized aluminum alloy with matte black finish, this 40mm extension tube resists , minimizes thermal expansion, and withstands frequent field use — weighing only 114g yet enough to support heavy eyepieces or lightweight camera setups without flex or vibration.
Compact & Ready-to-Use: At just 7cm (2.8 inches) long with a slim 5cm top diameter and 5.9cm base, this extension tube fits easily into any astronomy gear bag; includes no extra parts — just one ready-to-install 2 inch telescope eyepiece extension tube with M48 thread, locking screws, and brass compression ring.
Description
Features:1. Made of aluminum and anodized black, durable for long time usage. 2. Suitable for 2inch telescope focusing device, eyepiece or accessory. 3. Equipped with locking finger screws for insertion of astronomical fittings. 4. The brass compression screw is used for 2inch eyepiece and astronomical photography filter, avoid telescope accessories broken. 5. Easy to use and portable, convenient to carry and store. Specification:Condition:100% Brand NewMaterial: Aluminium alloyColor: As Pictures ShownHead circle diameter: 5cm/2inchBottom circle diameter: 5.9cm/2.3inchTotal length: 7cm/2.8inchThread diameter: 2inch M48*0.75Weight: Approx.114g Package list: 1 x Telescope Extension Tube
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