Takahashi MCR300 Short Aux Ring

Product Overview

The MCR300 Short Aux Ring is a short auxiliary spacer ring in Takahashi's Mewlon-CR reducer accessory family, the same group of parts that includes the Reducer-CR (CCA-250 / Mewlon CRS / FSQ-106EX4) and the 645 Reducer-CA. It's a mechanical spacer, not an optical element.

Who It's For

This ring suits owners already working within the Mewlon-CR / CCA reducer accessory system who need a short spacer to complete their specific imaging train configuration.

Key Features & Design

• Short auxiliary spacer: adds a fixed, short length within the Mewlon-CR reducer system's mechanical chain.
• Simple mechanical ring: no optical elements — it exists purely to set spacing between adjacent parts.

Recommended Uses

Fine-tuning spacing within a Mewlon-CR / CCA-250 reducer imaging train where a short auxiliary ring is called for.

Compatibility and Accessory Notes

It sits within the same accessory family as the Reducer-CR (CCA-250 / Mewlon CRS / FSQ-106EX4) and the 645 Reducer-CA 0.72x. If you're assembling a Mewlon-CR imaging train and aren't sure whether this ring is the right spacer for your setup, send us your telescope and camera configuration and we'll confirm the fit with you before you order. See the Takahashi Back Focus Guide for spacing figures across the Takahashi system.

Frequently Asked Questions

Is it difficult to set up?

No — it's a simple mechanical spacer that threads into place within a Mewlon-CR reducer imaging train.

What is it best used for?

Completing spacing within a Mewlon-CR / CCA-250 reducer imaging train.

Does it affect the optical path?

No — it's a mechanical ring with no lens elements of its own.

What else do I need with it?

The Mewlon-CR reducer your train is built around, plus your camera's own adapter — send us your setup and we'll confirm what's needed.

Bottom Line

A short mechanical auxiliary ring within Takahashi's Mewlon-CR reducer accessory family, used to complete spacing in a CCA-250 / Mewlon-CR imaging train.