The Explore Scientific 20mm 100° Series Waterproof Eyepiece is built for immersive wide-field views and unmatched comfort. With its massive 100° apparent field of view, it creates a panoramic window to the cosmos that reduces the need for constant repositioning in non-tracking telescopes.
Designed with a fully argon-purged and O-ring sealed housing, this eyepiece is impervious to internal fogging and resists the intrusion of fine particulates and fungus. Each unit is tested underwater at 1 meter for 30 minutes to ensure waterproof reliability. The multi-coated and edge-blackened optics enhance contrast, reduce stray light, and reveal fine details with crisp clarity.
The 20mm focal length offers a powerful combination of magnification and field size, making it a top choice for observing galaxies, star fields, and large nebulae. A generous 14.5mm eye relief makes it ideal for eyeglass wearers and extended observing sessions.
⭐ Features & Benefits
- Massive 100° Apparent Field of View – Experience a true window into space with ultra-wide, immersive visuals
- Ideal for Deep Sky Observing – Perfect for sweeping views of nebulae, open clusters, and galaxy groups
- Waterproof & Argon-Purged Housing – Fully sealed and submersion-tested to IPX7 (1 meter for 30 minutes)
- Fully Multi-Coated, Edge-Blackened Optics – Delivers high contrast, improved light transmission, and sharp detail
- 14.5mm Eye Relief – Comfortable for eyeglass wearers and extended viewing sessions
- Precision-Machined Barrel – Ensures secure alignment and durability during field use
- Built for All Conditions – Designed to withstand moisture, temperature shifts, and rugged use in any environment
🌟 Who It’s For
- Amateur and advanced astronomers seeking maximum field of view
- Deep sky observers looking for sweeping, wide-angle views with great clarity
- Eyeglass wearers who need comfortable long-eye-relief optics
🎯 Ideal Targets
- Large nebulae like the Veil, North America, or Lagoon
- Open star clusters such as the Pleiades or Double Cluster
- Broad Milky Way sweeps or panoramic galaxy fields
- Wide-field lunar and terrestrial observing
🎒 What’s Included
- Explore Scientific 20mm 100° Series Waterproof Eyepiece
- Protective caps (top and bottom)
- Eyepiece storage box
Specs
| Item Number | EPWP10020–01 |
| Focal Length | 20mm |
| Apparent Field | 100° |
| Eye Relief | 14.5mm |
| Field Stop Diameter | 34.8mm |
| Barrel Size | 2.00" |
| Length | 156mm |
| Width | 70mm |
| Weight | 916g |
| Waterproofing | Argon Purged / O-Ring Sealed |
| Eyecup | Removable Soft 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