Takahashi FSQ-130ED Aux Ring 27.5mm

Product Overview

The Aux Ring (FSQ-130) is Takahashi's Aux. Ring (S) for the FSQ-130ED, with a published light path of 27.5 mm — the amount it contributes to your optical train, not its physical length end to end.

Who It's For

This is a good match if you own an FSQ-130ED and are building out its camera or accessory train and need this defined 27.5 mm connection point.

Key Features & Design

• 27.5 mm published light path: a fixed, known contribution to your back focus total.
• Built for the FSQ-130ED: matches this telescope's own accessory ring family rather than a universal fitting.
• Single-piece metal ring: no moving parts to maintain.

Recommended Uses

Extending or completing the camera or accessory chain on an FSQ-130ED for imaging.

Compatibility and Accessory Notes

Built for the FSQ-130ED. The 27.5 mm figure is worth adding to your full back-focus total alongside any reducer, flattener, or filter wheel already in the chain — the Takahashi Back Focus Guide tabulates every Takahashi adapter's light path alongside each telescope's back focus target.

Frequently Asked Questions

Is it difficult to set up?

No — it is a single ring with no adjustment.

What is it used for?

Adding a defined 27.5 mm connection point in the FSQ-130ED's camera or accessory train.

Is it specific to the FSQ-130ED?

Yes — Takahashi lists it specifically for the FSQ-130ED rather than as a universal ring.

Bottom Line

A 27.5 mm light-path Aux Ring built for the FSQ-130ED's camera and accessory train.