Takahashi CAA Reducer Coupling (TKA36002)

Takahashi CAA Reducer Coupling (TKA36002)

The TKA36002 is designed to live inside the Camera Angle Adjuster (CAA) of the FSQ‑106ED, serving as the critical bridge between the reducer and your imaging payload. Though it might just look like another sleeve, its precise dimensions are essential: it positions the reducer perfectly within the CAA, extending the imaging train by nearly 20 mm beyond external components.

Without it, infinity focus stays stubbornly out of reach. With it in place, the reducer and CAA become a unified optical platform—rigid, concentric, and optimized for sharpness. It is, in essence, a fulcrum of precision, making sure that what you see at the center of the field is mirrored at the very edge.

Cloudy Nights Insight:
FSQ‑106 users describe the CAA coupling as "the unsung hero of the reducer train"—without it, most configurations simply can’t focus. One observer said that once installed, "stars were sharp corner to corner where they never were before."

Observing Tip:
Place the coupling inside the CAA before adding reducer and camera adapters. This builds the train from the inside out, ensuring threads seat correctly and focus is attainable without stressing the focuser mechanisms.