SVBONY · W2811A · EYEPIECE SIZE ADAPTER
Use your 0.965″ eyepieces in a 1.25″ holder
A metal reducer adapter for connecting smaller-barrel eyepieces to a compatible modern telescope eyepiece holder.
The SVBONY W2811A adapts a 1.25-inch eyepiece holder to accept a 0.965-inch eyepiece. It is useful when you want to retain an older 0.965-inch eyepiece and use it with a telescope or diagonal fitted with a 1.25-inch receiver.
Check the connection direction
Telescope or diagonal side: 1.25-inch holder.
Eyepiece side: 0.965-inch barrel.
The adapter’s larger barrel fits into the 1.25-inch holder; its smaller opening receives the 0.965-inch eyepiece. The supplied side thumbscrew secures the smaller eyepiece barrel. Tighten the holder and eyepiece retaining screws gently before use.
A mechanical size conversion
This adapter changes the physical fitting. It does not change the eyepiece’s focal length, magnification or optical field. Check that your focuser has enough travel to reach focus with the adapter and chosen eyepiece; mechanical fit alone does not guarantee focus in every telescope.
Specifications
| Brand | SVBONY |
|---|---|
| Manufacturer SKU | W2811A |
| Telescope-side fitting | 1.25-inch barrel, nominally 31.7mm |
| Eyepiece accepted | 0.965-inch barrel, nominally 24.5mm |
| Construction | Metal |
| Colour | Black |
| Eyepiece retention | Side thumbscrew |
What’s included
One SVBONY W2811A reducer adapter. Eyepiece, diagonal and telescope are sold separately.
Ordering the opposite direction? W2811B is the separate adapter for using a 1.25-inch eyepiece in a 0.965-inch holder. Check the letter suffix before ordering.
Ask Dark Clear Skies if you need help identifying your telescope’s eyepiece fitting.
