Eyepiece Ring Adapter 36.4mm To 31.7mm For Telescopes Converts 1.43 Inch To 1.25 Inch Thread 27mm Optical Path Model 3720-03 No Fuss Easy Fit Eyepiece Converter For Refractor And Reflector Scopes

Single-piece Eyepiece Ring Adapter 36.4mm to 31.7mm for Telescopes
✔️ Converts 36.4mm to 31.7mm eyepiece sizes with a 27mm optical path

This eyepiece ring adapter is a screw-on converter that lets you fit a 1.43 inch (36.4 mm) eyepiece into a 1.25 inch (31.7 mm) thread. It’s handy for both refractor and reflector scopes when swapping eyepieces or upgrading gear.

✅ Mounting eyepiece diameter: 1.4 inches (36.4 mm) screw

✅ Usable eyepiece diameter: 1.3 inches (31.7 mm)

✅ Optical path length: 1.1 inches (27 mm)

✅ Model number: 3720-03

✅ Type: screw diameter conversion adapter for refractor and reflector scopes

💡 What is a telescope eyepiece ring adapter used for and why should you consider it?

A handy accessory that lets you mix eyepieces with different diameters without swapping parts.

- Makes it easy to fit 36.4mm to 31.7mm eyepiece sizes on many scopes

- Helps minimize vignetting and maintain alignment when using smaller-diameter eyepieces

- Compatible with both refractor and reflector telescope setups

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