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    Omegon Plossl 12,5mm 40 1.25 Illuminated...
  • Omegon Plössl 12,5mm 40° 1.25″ Illuminated Crosshair Eyepiece

    • Article No.: 20711
    • Manufactured by: Omegon
    • Shipping weight: 0.2 kg
    Sale price valid only until May 02, 2026

    Great price -7%
    83.35 €
    89.30 € You save 5.95 €
    Last item at this price!
    Last one in stock - order now! 
    • We have the goods in stock at our store and we can send them immediately.
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  • This product is available in the following variants:
     Omegon Kellner 12mm 50° 1.25″ Illuminated Crosshair Eyepiece 61.40 €
     Omegon Plössl 9mm 50° 1.25″ Illuminated Crosshair Eyepiece 69.60 €
     Omegon Plössl 12,5mm 40° 1.25″ Illuminated Crosshair Eyepiece 83.35 €

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

Specifications

Type of eyepiece: Reticle
Focal length: 12.5 mm
Connection type: 1.25″
Apparent field of view: 40°
Number of optical components / single lenses: 4


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