Tele Vue Optics Mount Ring Set for 4” Diameter Tubes:

Secure and Versatile Mounting

Ideal for Astro-Imaging: Designed to provide a solid and stable mounting solution for 4" and 5" telescopes, enhancing astro-imaging capabilities.
Versatile Mounting Options: Both the bottom and top of each ring feature ¼"-20 hardware drillings, compatible with a range of mounting setups.
Convenient Bat-Handle Locks: Equipped with user-friendly bat-handle locks for secure and easy adjustments.
Accessory Compatibility: Includes two Tele Vue accessory slots on each ring, perfect for attaching various accessories like Starbeam, Sol-Searcher, and Piggy-Cam.
Adjustable Spacing: Set comes with a top accessory bar and a bottom mounting plate, allowing for adjustable spacing between 5.5" to 6.5".
Universal Bottom Plate Included: The included BPL-1098 bottom plate is drilled for compatibility with various mounts and adapter plates, including the Tele Vue/Vixen Mount Adapter (AVT-1011) and Tele Vue Gibraltar-5 Head.
Specifically for NP101/NP101is: Tailored to fit the NP101/NP101is telescopes with an outside tube diameter of exactly 4 inches.
Astrophotography Ready: A must-have for astrophotographers seeking a reliable and adaptable mounting solution for their telescopes.