Omegon Kellner 12mm 50° 1.25″ Illuminated Reticle Eyepiece
Every detail matters in astrophotography. The Omegon Kellner 12mm illuminated reticle eyepiece is designed for situations where you need full control over your guide star - whether you are using an off-axis guider or a dedicated guide telescope. The illuminated dual crosshair lets you position the guide star precisely at the centre of the eyepiece without obscuring it. A single crosshair can easily swallow a faint star, but the dual design keeps it clearly visible at all times. Any drift from the centre position is immediately apparent, so you can correct your tracking before errors appear in your image.
Precision optics for faint guide stars
The quality optics in this eyepiece can lock onto faint guide stars that simpler designs sometimes struggle to capture. The lens focusing mechanism lets you sharpen the crosshair to match your own eyesight - no correction lenses required. Power is supplied by two LR44 batteries, which are not included.
More than just a guiding tool
This crosshair eyepiece for astrophotography is useful beyond direct guiding. It works well for measuring fields of view, aligning the polar axis of your mount, and determining position angles of double stars. If you need one eyepiece that handles multiple precise tasks at the telescope, this design offers the versatility you are looking for.
Key features
- Illuminated dual crosshair - keeps faint guide stars fully visible
- Precise lens focus - adjust sharpness of the reticle to your eyesight
- Quality optics suitable for faint guide stars
- Compatible with off-axis guiders and guide telescopes
- Useful for polar alignment, field of view measurement, and double star work
- Standard 1.25″ barrel - fits most focusers
- Power: 2 x LR44 batteries (not included)
Technical specifications
| Parameter |
Value |
| Focal length |
12 mm |
| Field of view |
50° |
| Barrel diameter |
1.25″ |
| Reticle type |
Illuminated dual crosshair |
| Power supply |
2 x LR44 (not included) |
Who is this eyepiece for?
Astrophotographers who guide their exposures manually or semi-manually will benefit most from this eyepiece. It is also a practical choice for visual observers who need a reliable tool for precise alignment tasks and double star observation.
