Omegon LE Planetary 3mm eyepiece 55° 1.25″
Looking for an eyepiece that truly reveals what your telescope is capable of when observing planets? The Omegon LE Planetary is designed exactly for this purpose. It combines elegant construction with above-average optical performance, delivering exceptionally sharp and high-contrast images - whether you are observing the rings of Saturn, the surface of Mars, or the cloud belts of Jupiter. The 3mm focal length model is intended for high magnifications and detailed planetary work.
Optical construction
The Omegon LE Planetary eyepiece consists of seven optical elements in four groups - a configuration that ensures excellent aberration correction and uniform sharpness across the entire 55° field of view. The lens edges are blackened, which effectively suppresses unwanted internal reflections. All optical surfaces feature FMC (Fully Multi-Coated) anti-reflection coatings, which maximise light transmission and contribute to bright, richly coloured images free from rainbow fringing or stray brightness.
The result, confirmed by comparative tests, is higher transparency and a noticeably darker sky background compared to standard eyepieces in a similar price range. In planetary observation this is critical - the deeper the black background, the better the fine surface details of planets stand out.
Comfort during observation
One of the most practically important parameters of any eyepiece is the eye relief. In the Omegon LE Planetary it is 20mm, which means that users who wear glasses can observe comfortably without removing their spectacles - whether corrective or otherwise. The 55° field of view is well balanced for a planetary eyepiece: it is not as narrow as in classic orthoscopics, yet not so wide as to complicate the correction of edge aberrations.
No bean effect
The internal baffle system is carefully designed to suppress stray light to a minimum before it reaches your eye. The practical result is the complete absence of the so-called bean effect - an unpleasant phenomenon where moving your gaze toward the edge of the field causes a partial loss of image. With this eyepiece you simply observe the entire field of view without disruptive blackouts, even when your eye is not perfectly aligned with the optical axis.
Compatibility
The LE Planetary eyepieces also perform well with Newtonian reflectors with fast focal ratios (f/5 and below), where lesser-quality eyepieces typically suffer from coma distortion at the edges of the field of view. The standard 1.25″ barrel diameter ensures compatibility with the vast majority of modern telescopes on the market.
Who is this eyepiece for?
The Omegon LE Planetary is the choice for observers who refuse to compromise between comfort and optical performance. The combination of FMC coatings, a precision baffle system, generous eye relief, and the absence of the bean effect forms a compact whole that works reliably from the very first look. Whether you are a beginner who has just acquired your first telescope or an experienced amateur astronomer looking for a reliable planetary eyepiece for everyday use - the LE Planetary range has something to offer.
The 3mm model, used together with the longer focal lengths available in the range (5, 6, 9, 12.5, 14.5 and 18mm), forms a complete set for versatile sky observation.
Key specifications
| Parameter |
Value |
| Focal length |
3mm |
| Field of view |
55° |
| Eye relief |
20mm |
| Optical design |
7 elements in 4 groups |
| Coatings |
FMC (Fully Multi-Coated) |
| Barrel diameter |
1.25″ |
| Suitable for glasses wearers |
Yes |
| Bean effect |
None |
