Omegon Ortho 10.5mm 48° 1.25″ Eyepiece
Planetary observation depends on image sharpness above everything else. Whether you are watching the cloud bands of Jupiter, the polar caps of Mars, or the rings of Saturn, you need an eyepiece that holds detail all the way to the edge of the field of view. Omegon Ortho eyepieces are a classic choice among experienced observers - their strength is not a wide field of view, but exceptional image clarity.
Four-element optics - more light, more contrast
The optical design uses only four elements. Light passes through a minimum number of glass surfaces, loses less energy, and the result is a bright image with high contrast. This is exactly what makes orthoscopic eyepieces a favourite tool for observing double stars - stars that once blurred together are now easy to separate. All optical elements carry a full anti-reflection coating, which suppresses unwanted reflections and raises contrast further.
Sharp across the entire field of view
The 48° field of view feels compact, but the image is sharp and even throughout - no blurring or distortion at the edges. An eyepiece designed for planetary observation must reproduce what is really there, free from colour or geometric aberrations. The orthoscopic design delivers that reliably. You see objects as they truly are.
Comfortable eye placement
A soft rubber eyecup helps you position your eye correctly and blocks stray ambient light that would otherwise reduce contrast and cause unwanted reflections. Observing stays comfortable even during long sessions.
Part of the Omegon Ortho range
This model has a focal length of 10.5mm. The Omegon Ortho range is also available in 16.8mm and 24mm versions. All eyepieces share a 1.25″ barrel with a filter thread and fit any standard 1.25″ focuser.
Technical specifications
| Parameter |
Value |
| Focal length |
10.5mm |
| Field of view |
48° |
| Barrel diameter |
1.25″ |
| Optical design |
Orthoscopic (4 elements) |
| Coatings |
Fully multi-coated (FMC) |
| Filter thread |
Yes |
| Eye cup |
Soft rubber |