Omegon Plössl 12.5mm 40° 1.25″ Illuminated Reticle Eyepiece
Accurate guiding makes the difference between a sharp astrophoto and a blurred one. This Omegon eyepiece features an illuminated double crosshair reticle designed specifically for guiding work - whether you use an off-axis guider or a dedicated guide scope. The double crosshairs let you centre a guide star precisely, not just cover it. Any drift from the correct position becomes visible straight away, so you can correct your tracking within seconds.
Red LED illumination that protects your night vision
The crosshairs are lit by a red LED. You control the brightness with a rotary switch on the side of the eyepiece. Red light keeps your night vision intact while making the crosshairs clearly visible even in difficult conditions. A dioptre correction ring lets you bring both the star and the crosshairs into sharp focus at the same time - no compromises needed.
Optical quality you can rely on
The 12.5mm focal length gives you enough magnification for precise tracking control. The four-element Plössl optical design uses fully multi-coated lenses to reduce reflections and deliver a clean 40° field of view. The standard 1.25″ barrel fits most mounts and telescopes without any adapters.
More uses than just guiding
This eyepiece is not limited to astrophotography guiding. It is also useful for:
- Determining the field of view of your telescope
- Precise polar alignment of your mount
- Measuring position angles of double stars
It is a practical, multi-purpose tool for anyone who wants to work with their mount more accurately.
The right accessory makes all the difference
Precise guiding in astrophotography is not a matter of luck - it is a matter of choosing the right equipment. The Omegon illuminated reticle eyepiece is a straightforward, reliable instrument that does its job without unnecessary compromise.
Technical specifications
| Parameter |
Value |
| Focal length |
12.5mm |
| Field of view |
40° |
| Barrel diameter |
1.25″ |
| Optical design |
Plössl (4-element) |
| Lens coating |
Fully multi-coated (FMC) |
| Reticle illumination |
Red LED |
| Brightness control |
Rotary switch |
| Dioptre correction |
Yes |
| Reticle type |
Double crosshair |
| Recommended use |
Guiding, polar alignment, position angle measurement |