Takahashi FS-60CB Visual Adapter

Product Overview

The FS-60CB Visual Adapter is Takahashi's dual-thread conversion ring for the FS-60 series, stepping either an M55.9 x 0.75 or an M52 x 0.75 telescope-side thread down to M43 x 0.75 for visual accessories. Takahashi publishes a 10 mm light path and a 35 g weight for the part.

Who It's For

This is a good match if you're building a visual train on an FS-60CB or similar M55.9/M52-threaded Takahashi refractor and need to step down to the M43 visual-accessory standard.

Key Features & Design

• Dual telescope-side thread: M55.9 x 0.75 female or M52 x 0.75 female, covering both common Takahashi drawtube standards.
• M43 x 0.75 female output: Takahashi's standard visual-accessory thread.
• 35 g: the published weight for the part.
• Takahashi part TKP20005 — listed as "Visual adapter n°10."

Recommended Uses

Use it to convert an FS-60CB or comparably threaded Takahashi drawtube down to M43 for a diagonal, eyepiece holder, or other M43-standard visual accessory.

Compatibility and Accessory Notes

Takahashi publishes this adapter's light path as 10 mm, and its own diagram shows that figure applies through the M52 side — the M55.9 side runs 15 mm instead, so the number that applies depends on which thread engages your telescope. This is what the adapter contributes to your optical train, not a caliper measurement of the ring itself. The Takahashi Back Focus Guide tabulates this alongside the FS-60CB's back focus target.

Good to Know Before You Order

The light path depends on which thread you engage. Takahashi publishes 10 mm through the M52 side and 15 mm through the M55.9 side. If you need the precise figure for your build, send us your telescope model and we will confirm which thread — and which light path — applies.

Frequently Asked Questions

Is it difficult to set up?

No — it threads directly onto the drawtube on whichever side matches your telescope's thread.

What is it best used for?

Converting an FS-60CB-family M55.9 or M52 drawtube down to Takahashi's M43 visual-accessory thread.

Does it work for imaging as well as visual use?

It carries no optics, so it works mechanically the same way in an imaging train, though Takahashi designates it a visual adapter.

Bottom Line

A 35 g dual-thread ring that steps an FS-60CB-family drawtube down to M43, with a published light path of 10 mm through its M52 side.