1. M48 Thread: This extension tube features a standard M48x0.75mm external and internal threading with a diameter of 2 inches (approximately 50.8mm). This design ensures compatibility with most telescopes, cameras, and astronomical equipment, making it ideal for both everyday observations and astrophotography.
2. Anti Reflection Processing: The internal threading is treated to reduce optical reflections and interference, ensuring clearer and brighter images during photography. This feature is particularly beneficial for astrophotography, helping to minimize unwanted light reflections that can negatively impact image quality.
3. Accurate ​ Length Adjustment: By using this extension tube, you can achieve the correct image scale and the accurate spacing required for ​ reducers and field flatteners. This is essential for solving ​ length and spacing issues in astrophotography.
4. Suitable for All Users: The extending ​ is easy to install and remove, making it user friendly for both beginners and professionals. Whether you're an astronomy enthusiast or a dedicated astrophotographer, you can quickly and easily connect it to your telescope setup for accurate observations and imaging.
5. Material: Constructed from all metal material and utilizing an anodized aluminum finish, this extension tube offers enhanced longevity. Its robust build ensures stability and efficiency in various harsh environments, allowing for long term use without compromising performance.

Specification:
Item Type: Astronomical Telescope Extension Tube
Material: Aluminum Alloy
Matte Finish: Internal Anti Reflection Threads
Internal Thread Specification: M48x0.75mm / 1.89x0.03in
External Thread Specification: M48x0.75mm / 1.89x0.03in
External Thread Depth: 3mm / 0.12in
Outer Diameter: 50.08mm / 2in
Flange Spacing: 12mm / 0.47in
Overall Length: 15mm / 0.59in

How to Use:
Install and use.

Package List:
1 x Astronomical