Starlight Instruments Adapter 2.0

This adapter is specifically designed for Astro-Tech 6-inch and 8-inch Ritchie-Chrétien telescopes that feature a 90x1mm threaded rear cell. Please verify your telescope's rear cell threading before purchasing to ensure compatibility.

This adapter is engineered to connect a 2.0-inch rack and pinion Feather Touch focuser to your telescope. While it may physically fit other 2.0-inch focusers, it is optimized for the mechanical tolerances of Starlight Instruments' own Feather Touch line.

Yes, by providing a rigid, precision-machined connection between the rear cell and the focuser, this adapter minimizes the mechanical flexure that can cause alignment issues during long-exposure imaging.

Installation is straightforward and typically involves threading the adapter directly onto your telescope's rear cell. Once secured, you can attach your focuser to the adapter using the standard mounting points.

Generic adapters often lack the precise machining required to maintain perfect optical alignment, which can lead to tilt or instability. This adapter is built to the exact specifications of the Astro-Tech Ritchie-Chrétien series, ensuring a secure, wobble-free fit that protects your optical train.