Takahashi 2" 72mm Extension Ring (TKA23250)

Takahashi 2" 72mm Extension Ring (TKA23250)

Sometimes the difference between a perfectly dialed-in imaging train and a frustrating night under the stars is a single, precision-machined ring. The TKA23250 is just such a ring—a beautifully crafted 72mm-threaded extension that adds just over 52mm of optical length to your system, solving spacing issues and mechanical limitations without resorting to makeshift adapter stacks.

Engineered for seamless compatibility with Takahashi’s FSQ and FC refractors, this extension ring is often the unsung foundation behind a successful imaging configuration. Whether you’re integrating a full-frame camera with a filter wheel, adding an off-axis guider, or compensating for a rotator’s depth, the TKA23250 gives you the room—and the rigidity—to make it all work. Its wide internal bore prevents vignetting on large sensors, and its solid aluminum construction maintains alignment even under load.

No shortcuts. No flex. Just Takahashi precision from start to finish.

Cloudy Nights Community Insight:
Users running FSQ-106 setups with full-frame CMOS cameras have frequently pointed out that this ring “solves spacing when nothing else will.” It's especially helpful when using Takahashi’s CA-72 adapter or when incorporating heavy filter wheels: “I needed exactly this extension to get my ASI6200MM and wheel to reach focus with the flattener in place.”

Observing Tip:
This extension is most commonly used on imaging scopes where you want to minimize focuser drawtube travel. Keep it installed between your CA adapter and the rest of your imaging train to keep the scope balanced, minimize sag, and avoid accidental overextension of your focuser.