Omegon LE Planetary 5mm 55° 1.25″ eyepiece
If you are looking for an eyepiece that truly makes a difference in planetary observation, the Omegon LE Planetary series is the answer. The 5mm focal length model with a 55° apparent field of view is a popular choice among astronomers who refuse to compromise on image quality. Exceptionally high contrast, clean rendering free of distortion at the edge of the field, and minimal light scatter - these are the qualities that set this eyepiece apart from ordinary competitors in the same price range.
Optical design and coatings
The Omegon LE Planetary 5mm eyepiece consists of seven optical elements arranged in four groups. This design ensures excellent aberration correction and a sharp image across the entire field of view. All optical elements feature fully multi-coated (FMC) anti-reflection coatings, which maximise light transmission and reduce unwanted reflections. The lens edges are blackened to eliminate stray light, resulting in a truly clean and bright image against the dark sky background. Compared to eyepieces from other series, this model has demonstrated higher transparency and noticeably better fine detail rendering with minimal scattered light.
Comfortable viewing - even with glasses
One of the most practically significant features of this eyepiece is its generous 20mm eye relief. This means that observing with glasses is fully comfortable, and vision correction is no longer an obstacle when watching planets. The 55° field of view provides a pleasant sense of space during observation - you will not experience the constricted feeling that is common with high-power planetary eyepieces of shorter focal length.
The eyepiece also has no so-called "kidney bean effect" - the unpleasant blackout that occurs at the edges of the field when the eye moves off-axis. This is particularly appreciated during longer observing sessions, where you no longer need to maintain a precise optical axis at all times.
Compatibility and available focal lengths
The LE Planetary series performs excellently with Newtonian telescopes, where other eyepieces of a comparable class often suffer from coma or edge distortion. The standard 1.25″ barrel diameter ensures compatibility with the vast majority of amateur and semi-professional telescopes.
The LE Planetary series is available in the following focal lengths, allowing you to build a complete set covering the full magnification range:
- 3mm
- 5mm
- 6mm
- 9mm
- 12.5mm
- 14.5mm
- 18mm
Technical specifications
| Parameter |
Value |
| Focal length |
5mm |
| Apparent field of view |
55° |
| Eye relief |
20mm |
| Optical design |
7 elements in 4 groups |
| Coatings |
FMC (Fully Multi-Coated) |
| Barrel diameter |
1.25″ |
About Omegon
Omegon is a brand that devotes exceptional care to the price-to-performance ratio and practical usability of its products. The LE Planetary series was developed in direct response to the needs of real planetary observers - people who want to get the most out of their telescope without having to invest in professional equipment at ten times the price. Carefully crafted optics, reliable mechanical construction, and thoughtful details such as blackened lens edges and generous eye relief all demonstrate that Omegon approaches eyepiece manufacturing responsibly and with a genuine understanding of the needs of amateur astronomy. If you are considering expanding your eyepiece collection, the LE Planetary series is well worth a closer look.
