Experience stunning clarity and immersion with the Explore Scientific 18mm 82° Series Waterproof Eyepiece — a versatile tool ideal for upper-medium magnification viewing. Whether you're exploring dense globular clusters, tracing the glow of planetary nebulae, or seeking faint cometary tails, this eyepiece delivers wide, high-contrast views that make deep-sky observing unforgettable.
Engineered with premium low-dispersion, high refractive index glass, this eyepiece provides crisp resolution and vibrant contrast. The 82° apparent field of view surrounds your vision with expansive celestial detail, while EMD coatings and edge-blackened optics enhance contrast and reduce light scatter. Designed for rugged outdoor use, the argon-purged waterproof housing ensures fog-free, contamination-resistant performance in any observing conditions.
Compatible with Explore Scientific Focal Extenders, this eyepiece allows for flexible magnification options — without sacrificing eye comfort or field of view.
CA Residents: Prop 65 WARNING(S)
🌟 Features & Benefits
- 18mm focal length for upper-medium magnification
- 82° ultra-wide field creates an immersive visual experience
- Low-dispersion, high-index glass delivers high-resolution clarity
- Fully EMD-coated and edge-blackened optics for maximum contrast
- Argon-purged, waterproof housing prevents fogging and internal damage
- Compatible with Explore Scientific Focal Extenders for added flexibility
- Ideal for planetary nebulae, clusters, and faint objects using averted vision
🎯 Who It’s For
- Deep-sky observers seeking expansive, high-contrast views
- Eyeglass wearers who want long eye relief and immersive fields
- Astronomy enthusiasts using non-tracking or Dobsonian telescopes
🔭 What You’ll Be Able to See
- Crisp detail in globular and open clusters
- Faint structure in planetary nebulae and comets
- Excellent contrast in brighter planetary features and lunar landscapes
🎒 What’s Included
- Explore Scientific 18mm 82° Waterproof Eyepiece
- Protective dust caps
- Soft storage pouch
Specifications
| Item Number | EPWP8218–01 |
| Focal Length | 18mm |
| Apparent Field | 82° |
| Eye Relief | 13mm |
| Field Stop Diameter | 25.3mm |
| Barrel Size | 2.00" |
| Length | 89mm |
| Width | 56mm |
| Weight | 13.7 oz / 390g |
| Waterproofing | Argon Purged / O-Ring Sealed |
| Eyecup | Removable Flip-Down Silicone Rubber |
Warranty Information:
This product includes a Limited One-Year USA Warranty, which converts to the Explore STAR Transferable Extended Life of the Product Warranty when registered within 60 days of purchase.
To activate your warranty, register your product at:
www.explorescientific.com/pages/product-registration