Explore Scientific 18mm 82° 2″ eyepiece
Are you looking for an eyepiece that will let you truly experience the night sky - not just peek through a lens, but literally immerse yourself in the universe? The wide-angle Explore Scientific 18mm eyepiece with an 82° apparent field of view and a 2″ barrel diameter is exactly what experienced astronomers are looking for. A six-element optical design, argon filling and fully multi-coated optics - all in one premium eyepiece.
Wide 82° field of view - a natural view of the sky
The eyepiece uses a six-element optical system that delivers an exceptionally wide apparent field of view of 82°. At such an angle, the observer's eye naturally relaxes - it is not forced to look through a narrow "peephole", but perceives the scene with peripheral vision just as naturally as when looking at the night sky with the naked eye. The result is greater comfort during long observing sessions and the ability to capture fine details right to the edges of the field of view.
The 18mm focal length makes it a versatile tool suitable for both planetary and deep-sky observation - offering moderate magnification with excellent light throughput and a spacious, immersive view.
13mm eye relief - comfortable for eyeglass wearers
The 13mm eye relief is one of the key parameters of this eyepiece. It means that observers who wear glasses can use the eyepiece comfortably, as the eye does not need to be pressed directly against the lens. The soft rubber eyecup is fold-down and well shaped, eliminating unwanted stray light while also protecting both the eye and the eyepiece during handling. The overall body construction is robust, with a matte black finish that prevents internal reflections.
Argon filling and FMC coatings for the clearest possible image
Argon filling protects the internal optics from fogging and moisture condensation - a significant advantage when moving from a warm interior into the cold night air. The inert argon gas also prevents dust accumulation and oxidation of lens surfaces. All optical surfaces are equipped with FMC coatings (fully multi-coated anti-reflection coatings), which maximise light transmission and eliminate unwanted ghost images and reflections. The matte black layer on the inner walls of the housing and on the edges of the lenses further suppresses light scatter and increases image contrast.
Who is this eyepiece for?
The Explore Scientific 18mm 82° eyepiece is appreciated by experienced astronomers who want to get the most out of every observing session - whether they are observing nebulae and star clusters that require a wide field of view, or planets where contrast and image clarity matter most. The 2″ barrel ensures compatibility with all standard astronomical telescopes with a 2″ focuser drawtube. The robust and durable construction makes it a reliable companion for many years of observing.
Technical specifications
| Parameter |
Value |
| Focal length |
18mm |
| Apparent field of view |
82° |
| Barrel diameter |
2″ |
| Eye relief |
13mm |
| Optical design |
Six-element |
| Coatings |
FMC (fully multi-coated) |
| Filling |
Argon |
| Eyecup |
Fold-down rubber |
About the Explore Scientific brand
Explore Scientific is a brand for demanding astronomers who do not want to compromise on optical quality. The eyepieces in this series are designed with an emphasis on precise optical construction, quality materials and long service life. Argon filling, FMC coatings and an ergonomic design are not just marketing buzzwords - they are specific technical solutions that make a real difference at every observing session. Explore Scientific has an excellent reputation in the astronomical community thanks to its meticulous attention to detail and a wide range of accessories that work seamlessly together.
