Starlight Instruments 3.5" Adapter for Astro Physics Grand tourismo 130

Telescope tube adapters are not universal. This adapter is machined with the specific thread pitch and diameter required by the Astro-Physics Grand Tourismo 130 optical tube, ensuring a direct, secure fit to the 3.5" Feather Touch focuser body without any intermediate parts.

Installation is straightforward. It typically involves unthreading the stock focuser from the rear of the telescope tube and threading this adapter in its place. The 3.5" Feather Touch focuser then attaches directly to the adapter. Always handle your telescope optics with care during the process.

The primary benefit is enabling the use of a world-class focuser. The 3.5" Feather Touch offers exceptional load capacity and fine-focus control, which is critical for astrophotography. This adapter ensures that the connection is as rigid and reliable as the focuser itself, preventing flexure even with heavy cameras and filter wheels.

This adapter is machined from high-quality aluminum and anodized for durability. Starlight Instruments controls the entire manufacturing process in their own shop to maintain their reputation for high-precision components.

Yes. It is precision-machined to be perfectly square to the optical axis. A precise, rigid connection between the telescope and focuser is essential for maintaining collimation and achieving sharp, round stars across the entire image field, and this adapter is built to provide that stability.

Absolutely. This adapter is designed to complement the 3.5" Feather Touch focuser, which is itself engineered for heavy imaging trains. The solid aluminum construction creates a non-flexing link between your telescope and focuser, capable of supporting large format cameras, filter wheels, and off-axis guiders without tilt.