Omegon 1.25″ parfocal clamping rings - set of 3
Anyone who regularly switches between different eyepieces knows the frustrating moment when, after swapping an eyepiece, they have to refocus the telescope all over again. That is exactly the problem that parfocal clamping rings are designed to solve - a discreet but highly practical accessory that saves you time and effort during every observing session. This set of three Omegon rings for the standard 1.25″ diameter is everything you need to ensure that all your eyepieces share a common focal plane.
How parfocal clamping rings work
Parfocal rings are placed onto the barrel of the eyepiece and secured with a clamping screw. Each ring is carefully adjusted so that every eyepiece, once inserted into the focuser, requires the same focus position. Once you have set and locked the rings, switching eyepieces is as simple as swapping and observing - no more lengthy searching for a sharp image.
This is especially appreciated by:
- Visual observers who alternate between eyepieces of different focal lengths during a single night
- Astrophotographers who need quick and repeatable transitions between different magnifications or between an eyepiece and a camera
Product features
- Made from quality metal for reliable grip without damaging the eyepiece surface
- Clamping screw allows fine and precise adjustment of the ring position along the eyepiece barrel
- Set of 3 rings - covers your three most-used eyepieces, for example a low, medium and high magnification combination
- Designed for the standard 1.25″ barrel diameter - the most common format in amateur astronomy
Step-by-step setup guide
- Choose a reference eyepiece - usually the one you use most often.
- Focus on a star or a terrestrial object with the reference eyepiece and note the focuser position.
- Insert the second eyepiece, slide a parfocal ring onto its barrel and move the ring along the barrel until the focuser remains at the same position that gave a sharp image with the reference eyepiece.
- Lock the ring with the screw.
- Repeat the same process for the third eyepiece.
From that point on, all three eyepieces are parfocally aligned and switching between them is instant.
Who will benefit from this accessory?
This seemingly small addition significantly improves observing comfort - both for visual use and for astrophotography involving eyepiece and camera swaps. A set of three Omegon parfocal rings is a sensible investment with an immediate and tangible benefit for every serious amateur astronomer.
About the Omegon brand
Omegon is a German brand with a long tradition in astronomical optics and accessories, popular with beginners and experienced observers alike, all around the world. Omegon products are designed with a focus on practicality, reliability and accessible pricing, without compromising on build quality. These parfocal rings are no exception - a simple solution, well executed, that does exactly what it promises. If you are looking for an accessory you can rely on night after night, Omegon is a choice you will not regret.
Technical specifications
| Parameter |
Value |
| Compatible eyepiece barrel diameter |
1.25″ |
| Material |
Metal |
| Fixing method |
Clamping screw |
| Number of rings in set |
3 |
| Brand |
Omegon |
