Explore Scientific LER Ar 26mm 62° 1.25″ eyepiece
Looking for an eyepiece that can handle demanding field conditions while still providing comfortable viewing even with glasses? The Explore Scientific 26mm eyepiece from the 62° LER series is exactly what you need. It combines a wide 62° apparent field of view, a generous 20mm eye relief, and premium optical construction - all housed in a robust, argon-purged, waterproof body. Whether you are observing star clusters, nebulae, or planets, this eyepiece delivers a sharp, high-contrast image without compromise.
Wide field of view and sharp optics
The 62° apparent field of view combined with a 26mm focal length delivers a pleasant wide-field performance, giving you that spacious, immersive sense of depth as you sweep across the sky. The SWA (Super Wide Angle) optical design minimises image aberrations even when used with fast optics - that is, telescopes with a low focal ratio. The image remains sharp all the way to the edge of the field, free from ghost reflections or chromatic aberrations that plague cheaper eyepieces.
Long eye relief - comfortable viewing with or without glasses
The 20mm eye relief is the defining feature of the entire LER (Long Eye Relief) series. It means you do not have to press your eye directly against the lens - you can comfortably take in the full field of view even through spectacle lenses. The fold-down eyecup allows you to precisely adjust the distance between your eye and the eye lens, so every observer can find their ideal position quickly and without unnecessary trial and error.
EMD multi-layer coating for maximum light transmission
The optical system features a patented EMD (Enhanced Multi-layer Deposition) coating that maximises light transmission and contrast. The lens edges are carefully blackened to eliminate unwanted internal reflections that would degrade image quality - a detail that manufacturers of cheaper eyepieces often overlook. The result is a clean, high-contrast image free from ghost images and stray light scatter.
Argon purging and waterproof construction
The argon-purged eyepiece body effectively prevents internal fogging of the optics and stops dust, moisture, or fungus from penetrating between the lenses - problems that can permanently ruin otherwise quality glass. The waterproof stainless steel seal with a conical safety groove further protects the eyepiece in demanding conditions - dew, rain, or the large temperature swings that are common during night-time astronomy sessions.
A trusted choice for intermediate and advanced observers
Explore Scientific 62° LER series eyepieces rank among the most highly regarded mid-level to advanced eyepieces on the market. The Explore Scientific brand consistently combines thoughtful optical design with rugged, field-ready construction - while keeping prices significantly more accessible than comparable Japanese or German alternatives. Argon purging and waterproofing are not just marketing claims but genuine guarantees of long service life and consistent optical quality. If you are looking for an eyepiece that will serve you reliably for years and bring enjoyment to every observing session - whether from your back garden or a dark sky site in the mountains - this 26mm member of the LER series is an outstanding choice.
Technical specifications
| Parameter |
Value |
| Focal length |
26mm |
| Apparent field of view |
62° |
| Eye relief |
20mm |
| Barrel diameter |
1.25″ |
| Optical design |
SWA (Super Wide Angle) |
| Coating |
EMD (Enhanced Multi-layer Deposition) |
| Gas purging |
Argon |
| Waterproof |
Yes |
| Eyecup |
Fold-down |
| Lens edge treatment |
Blackened |
