The Explore Scientific 5.5mm 100° Series Waterproof Eyepiece belongs to a class of ultra-wide, high-performance oculars built to completely immerse you in the cosmos. With an incredible 100° apparent field of view, this eyepiece delivers a panoramic experience that’s ideal for lunar, planetary, and double star observing—especially when used with fast telescopes or non-tracking mounts like Dobsonians.
Its compact 5.5mm focal length provides crisp, high-magnification views while the hyper-wide field ensures longer drift time for objects crossing the field—a huge benefit for non-motorized telescopes.
Internally, the eyepiece is argon-purged and sealed, keeping optics safe from fog, moisture, and dust intrusion, even during extreme outdoor conditions. The fully multi-coated optics and edge-blackened lens elements maximize light transmission and eliminate unwanted reflections, enhancing contrast and clarity for serious visual performance.
Whether you're exploring Jupiter’s cloud bands, Saturn’s rings, or scanning for faint planetary nebulae, this rugged, precision-engineered eyepiece ensures your view is as clear and immersive as possible.
CA Residents: Prop 65 WARNING(S)
⭐ Features & Benefits
- 100° apparent field of view for sweeping, immersive sky views
- 5.5mm focal length ideal for high-power planetary and lunar observation
- Argon-purged, waterproof housing prevents fogging and protects against contamination
- Fully EMD-coated optics and edge-blackened lenses for superior brightness and contrast
- Supports averted vision—a critical technique for spotting faint deep-sky objects
- Perfect for non-tracking scopes, offering long drift time across the field
- Durable, precision-machined body built for rugged field use
🌟 Who It’s For
- Observers using Dobsonians or fast refractors
- Astronomers seeking high-power magnification without sacrificing clarity
- Eyeglass wearers who need comfortable long sessions at high magnification
- Visual explorers looking for deep contrast and pinpoint star performance
- Users who employ averted vision to hunt faint details and objects
🎯 What You’ll Be Able to See
- Planets in high detail, including bands on Jupiter or craters on the Moon
- Planetary nebulae and globular clusters with enhanced contrast
- Double stars resolved with clear separation
- Faint deep-sky objects revealed with the help of averted vision techniques
🎒 What’s Included
- Explore Scientific 5.5mm 100° Series Waterproof Eyepiece
- Bolt-style storage case for secure transport and storage
- Dust caps (top and bottom)
- Warranty card and usage documentation
Specs
| Item Number | EPWP10055–01 |
| Focal Length | 5.5mm |
| Apparent Field | 100° |
| Eye Relief | 10.5mm |
| Field Stop Diameter | 9.6mm |
| Barrel Size | 2.00" |
| Length | 150mm |
| Width | 56mm |
| Weight | 21.6 oz / 612g |
| 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