1. M48 Thread Design: This telescope camera extension tube features a standard M48x0.75mm threaded design with an outer diameter of 2 inches, ensuring compatibility with most telescopes, cameras, and astronomical devices.
2. Anti Reflection Coating: The interior threads are treated with a matte finish to minimize optical reflections and interference. This ensures clearer, brighter images during photography.
3. Accurate ​ Length Adjustment: This telescope camera extension ​ allows for accurate image scaling, meeting the accurate spacing requirements for ​ reducers and field flatteners.
4. User Friendly Design: Designed for easy installation and removal, this extension tube is suitable for both beginners and experienced users. Whether you're a hobbyist or a professional astrophotographer, you can easily connect it to your telescope for accurate observation or imaging.
5. Rugged Construction: Made from a full metal aluminum alloy and treated with anodized aluminum, this astrophotography focus extender tube boasts improved durability. It's built to withstand harsh conditions.

Spec:
Item Type: Telescope Extension Tube
Material: Aluminum Alloy
Anti ​ Treatment: Inner Anti ​ Thread
Inner Thread Specification: M48x0.75mm / M48x0.03in
Outer Thread Specification: M48x0.75mm / M48x0.03in
Outer Thread Depth: Approx. 4mm / 0.16in
Outer Diameter: Approx. 2in / 50.8mm
Flange Distance: Approx. 50mm / 1.97in
Total Length: Approx. 54mm / 2.13in

How to Use:
Install and use.

Package List:
1 x Telescope Extension Tube