Explore Scientific 82° 4.7mm

The Explore Scientific 82-degree 4.7mm eyepiece is designed for observers who want to push magnification while keeping a genuinely immersive field of view. At 4.7mm focal length, this eyepiece is best suited for high-power work on planets, double stars, and smaller deep-sky objects like globular clusters. The 82-degree apparent field of view is noticeably wider than standard eyepieces, which helps at high magnification by giving you more sky to track targets across.

The EMD (Enhanced Multi-layer Deposition) coatings on the glass elements improve light transmission and reduce internal reflections, which matters most when you are trying to resolve fine planetary detail or separate close double stars. The dual 1.25-inch and 2-inch barrel compatibility means this eyepiece will fit virtually any focuser without adapters. At roughly $824, this sits firmly in premium territory.

That price is justified if high-power planetary observation is a priority for you, but casual observers or those newer to the hobby may find strong performance at lower price points. This eyepiece rewards use on quality refractors and apochromats especially, where its optical design can fully shine.