Omegon 2″/1.25″ eyepiece adapter
Do you have a telescope with a 2″ focuser but want to use your favourite collection of 1.25″ eyepieces? That is exactly what the Omegon 2″/1.25″ adapter was designed for - a compact, precisely manufactured reducer that opens up a world of optical combinations without unnecessary compromises. Its well-thought-out construction ensures a firm and secure hold on the eyepiece even during demanding use.
Dual locking system for safe eyepiece retention
The adapter features a dual eyepiece locking system combining a traditional thumbscrew with a brass compression ring. This combination ensures that 1.25″ eyepieces are held evenly and without any risk of surface damage. The brass ring neither scratches nor deforms the eyepiece barrel - unlike lower-quality adapters equipped with a steel set screw only.
Technical parameters
| Parameter |
Value |
| Outer diameter |
2″ (standard) |
| Accepted eyepiece diameter |
1.25″ |
| Optical length |
10 mm |
| Locking system |
Thumbscrew + brass compression ring |
The outer diameter of the adapter meets the 2″ standard, so it fits the vast majority of modern and older 2″ focusers. The optical length of 10 mm is an important parameter - especially when calculating the correct focus position precisely.
Who is this adapter for?
The 2″ to 1.25″ reducer is an essential accessory for any telescope with a 2″ focuser. It suits:
- Beginners who are just building their eyepiece collection
- Experienced observers with an extensive set of 1.25″ optics
- Users of refractors, reflectors and catadioptric telescopes equipped with a 2″ focuser
The adapter allows you to switch flexibly between both standards and get the most out of your existing optics.
Simple to use - no tools required
Compact dimensions and straightforward operation are further advantages. Just insert the reducer into the focuser, tighten the thumbscrew, and then attach your 1.25″ eyepieces in the usual way. No complicated assembly, no additional tools needed.
About the Omegon brand
Omegon is a brand with a long tradition in astronomical optics and accessories. Its products are designed with an emphasis on practicality, durability and an accessible price - precisely what astronomers need in real observing conditions. Omegon adapters are manufactured from quality materials with carefully controlled tolerances, so there is no play or uncertainty when handling the telescope. The wide range of Omegon accessories also allows you to gradually build a complete and mutually compatible set of observing equipment.
