Takahashi 89mm Prime Focus Ring

Product Overview

The Prime Focus Ring (89mm) is a Takahashi accessory ring sized to an 89 mm accessory-ring interface, used to anchor a camera at prime focus in the optical train.

Who It's For

This is a good match if your Takahashi telescope's camera-side accessory system uses the 89 mm ring interface and you are setting up a prime-focus imaging connection.

Key Features & Design

• 89 mm ring interface: matches Takahashi's larger-format accessory ring family.
• Prime-focus mounting: holds the camera directly in the optical path rather than through an eyepiece projection.
• Satin-black finished metal ring: matches Takahashi's other camera-side rings.

Recommended Uses

Anchoring a camera at prime focus on a Takahashi telescope that uses the 89 mm accessory ring interface.

Compatibility and Accessory Notes

Fits Takahashi's 89 mm accessory ring interface. The Takahashi Back Focus Guide tabulates every Takahashi adapter's light path alongside each telescope's back focus target and is a useful starting reference for the rest of your chain.

Frequently Asked Questions

Is it difficult to set up?

No — it is a single ring that threads into the 89 mm accessory interface, with no adjustment involved.

What is it used for?

Anchoring a camera at prime focus on a Takahashi telescope using the 89 mm accessory ring system.

How do I know if my telescope uses this ring size?

Send us your telescope model and we will confirm whether it uses the 89 mm accessory ring interface this part fits.

Bottom Line

An 89 mm prime-focus ring for anchoring a camera in Takahashi's larger-format accessory ring system.