Optec Inc. AP2.7 x 24tpi Extension Tube, 3” Length: Precision Extension for Telescopes

Standard AP2.7 Inch Threads: Adopts the industry standard AP2.7 inch thread, ensuring wide compatibility with various astronomy equipment.
Dual Thread Design: Features female threads on one end and male threads on the opposite, facilitating easy attachment and removal.
Knurled Bases for Ease of Use: The knurled base design enhances grip, making the tube easy to attach and detach from other equipment.
Stackable and Versatile: Designed to be combined and stacked with other extensions, providing flexibility in achieving the desired length.
Ideal for Fixed Focal Length Telescopes: Suitable for fixed focal length telescopes, offering 1/4" (6.35mm) increments for precise focal adjustments.
Durable Material: Constructed from high-strength 6061 aluminum alloy, ensuring durability and longevity, and finished with a black anodized coating.
Minimized Internal Reflections: Equipped with anti-reflection threading and internal baffles to reduce internal light reflections.
Non-Reflecting Internal Paint: All internal surfaces are coated with ultra-flat, non-reflecting black paint, further reducing unwanted light scatter.
Professional Grade Telescope Accessory: A high-quality, professional-grade extension tube, essential for serious astronomers and astrophotographers.
Optimized for Telescope Customization: Designed to seamlessly integrate with existing telescope setups, enhancing overall functionality and user experience.

Specifications

AP2.7 Extension - 3" Length