Sky-Watcher Extension Tube For EQ3 / EQ5 / HEQ5 / AZ-EQ5

The Sky-Watcher Extension Tube is a specialized accessory designed for use with the EQ3, EQ5, HEQ5, and AZ-EQ5 mounts. This 41cm extension is essential for observers using long-tube telescopes, such as large refractors or long-focal-length Cassegrains. By raising the mount head higher above the tripod, it provides the necessary clearance to prevent the back of the telescope tube from coming into contact with the tripod legs when maneuvering or tracking objects directly overhead (at the zenith).

Constructed from heavy-duty materials to maintain the stability of your rig, this extension tube weighs 4.8kg and features a matching white finish to blend seamlessly with your Sky-Watcher mount. It has a width of approximately 10cm and comes with the required allen key for a secure and straightforward installation. Whether you are an astrophotographer or a visual observer, this extension is a practical solution for expanding your telescope's range of motion and ensuring uninterrupted tracking during long sessions.

Product Features in Detail

Prevents Mechanical Interference
When a long refractor is pointed straight up, the eyepiece end often swings low between the tripod legs. This extension tube raises the pivot point of the mount, ensuring that your telescope can track through the meridian and zenith without the risk of an expensive collision.

Stable Observation Platform
Despite adding height, the extension is engineered with a wide 10cm diameter and thick walls. This ensures that the center of gravity remains stable and that the mount's original load capacity is not compromised by excessive flexing or wobbling.

Ideal for Refractor Users
Owners of 100mm to 120mm refractors frequently find that the diagonal or camera hits the tripod before reaching the zenith. This tube is the industry-standard solution for making those large optical tubes usable across the entire sky.

Professional Fit and Finish
The extension tube is designed to sit flush between the tripod top and the mount head. The machining ensures a tight, high-tolerance fit that maintains the precise polar alignment required for long-exposure astrophotography.

Comfortable Viewing Height
Beyond just providing clearance, the 41cm boost can make visual observing much more comfortable. It raises the eyepiece to a more ergonomic level, reducing the need for the observer to crouch or sit on the ground when the telescope is pointed at high altitudes.

Complete Installation Kit
Sky-Watcher includes the specific allen key needed for the mounting bolts, meaning you don't have to search your toolbox for the right size. The setup is straightforward and can be completed in just a few minutes before your observing session begins.