SVBONY F9164A M42 to 1.25″ Eyepiece Adapter with Coaxial Lock

Product Overview

The SVBONY F9164A is an M42 to 1.25″ adapter: an M42 thread on one end and a 1.25″ holder on the other. It lets you hold 1.25″ eyepieces, or a camera with a 1.25″ nosepiece, on optics with an M42 connection, and lets M42-format eyepieces work with modern 1.25″ equipment. The holder uses a coaxial lock with a PETF inner ring that grips the barrel evenly. Net weight is 71.8 g (2.53 oz), finished in black and blue.

Who It's For

This is a good match if you want to use 1.25″ eyepieces or a 1.25″ planetary camera on an M42-threaded optic such as an SVBONY spotting scope, or if you have older M42-format eyepieces you want to keep using.

Key Features & Design

• M42 to 1.25″ conversion: bridges M42-threaded optics and 1.25″ eyepieces or cameras.
• Coaxial lock: clamps the barrel concentrically so the eyepiece or camera stays centred and does not slip.
• PETF inner ring: a durable, resilient ring that grips without marking the barrel.
• Light at 71.8 g.

Recommended Uses

• Digiscoping and planetary video: mounting a 1.25″ CMOS camera on an SVBONY spotting scope.
• Legacy eyepieces: using M42-format eyepieces with current 1.25″ equipment.
• Swapping eyepieces: a quick, secure 1.25″ holder on M42-threaded optics.

Compatibility and Accessory Notes

• SVBONY SV28 and SV14 spotting scopes: SVBONY pairs this adapter (F9164A) with the F9110A extension tube to connect a 1.25″ CMOS camera such as the SC001, SV105 or SV205.
• SVBONY SV13 spotting scope: SVBONY pairs it with the F9162A extension tube for the same purpose.
• Holder: standard 1.25″ eyepiece and camera barrels.

If you are connecting a different scope or camera, send us the models and we will work out the adapter chain with you.

What's in the Box

• 1 x SVBONY 1.25″ focuser adapter

Good to Know Before You Order

• Extension tubes sold separately: the camera setups above use the F9110A or F9162A tube in addition to this adapter.
• Mechanical adapter: it contains no optics.

Frequently Asked Questions

Is it difficult to set up?

No. Thread the M42 end onto your optic, slide the 1.25″ eyepiece or camera into the holder and tighten the coaxial lock.

Can I mount a planetary camera with it?

Yes. SVBONY uses it with an extension tube to connect 1.25″ CMOS cameras such as the SC001, SV105 and SV205 to its SV28, SV14 and SV13 spotting scopes.

What does the coaxial lock do?

It closes evenly around the barrel, keeping the eyepiece or camera centred and preventing it from slipping.

Bottom Line

In short: a 71.8 g M42 to 1.25″ adapter with a coaxial lock and PETF ring, holding 1.25″ eyepieces and cameras securely on M42-threaded optics.