Explore Scientific LER Ar 5.5mm 62° 1.25″ eyepiece
Looking for an eyepiece that reveals the finest details of Jupiter's cloud bands, Saturn's rings or lunar craters in stunning sharpness? The Explore Scientific LER Ar 5.5mm 62° eyepiece is designed exactly for this purpose. It combines modern optical construction with well-engineered mechanics, delivering performance appreciated by experienced observers and beginners stepping into serious planetary observation alike.
EMD coatings for maximum contrast
At the heart of this eyepiece are EMD (Enhanced Multi-layer Deposition) anti-reflection coatings, which significantly reduce light loss on optical surfaces and ensure high contrast in the resulting image. Fine surface details of planets stand out clearly, without being degraded by unwanted reflections or contrast-reducing veiling. The precisely machined mechanical construction effectively suppresses internal stray light - parasitic reflections have no chance of degrading your image, even when observing bright objects such as the Moon or Venus.
Argon fill - fog-free performance in any conditions
Argon gas filling is a feature you will not find in budget eyepieces. The argon sealed inside the optical barrel prevents moisture from condensing on the internal optical surfaces during temperature changes that occur throughout an evening observing session. You no longer need to worry about fogging and loss of sharpness at the very moment you have finally centred on a long-awaited planetary conjunction.
Long eye relief and compatibility
The eyepiece is equipped with a fold-down rubber eyecup and generous long eye relief (LER - Long Eye Relief), making it perfectly comfortable for observers who wear glasses. The eyecup folds down easily and the full field of view remains accessible without pressing your eye uncomfortably against the eyepiece. The 1.25″ barrel diameter ensures compatibility with the vast majority of modern telescopes.
Key features at a glance
- Focal length: 5.5mm
- Apparent field of view: 62°
- Barrel diameter: 1.25″
- EMD multi-layer anti-reflection coatings
- Argon gas fill - moisture-proof interior
- Long eye relief (LER) - suitable for eyeglass wearers
- Fold-down rubber eyecup
- Ideal for planetary and lunar observation
About Explore Scientific
Explore Scientific is a respected brand in astronomical optics, with a strong focus on making premium performance accessible. Their eyepieces undergo strict quality control and are popular in both amateur and semi-professional astronomy worldwide. The LER series with argon fill and EMD coatings represents the very best of what this brand currently offers. If you are looking for a reliable eyepiece for every observing night, the Explore Scientific LER Ar 5.5mm is a choice you will not regret.
