The Explore Scientific 17mm 92° Series Waterproof Eyepiece is designed to pull you into the universe with a hyper-wide 92° apparent field of view and long eye relief, delivering a deep-sky experience that's as comfortable as it is breathtaking. Whether you're using a tracking mount or a manual telescope, this eyepiece keeps celestial objects in view longer—making it easier to explore large structures like nebulae, star clusters, and galaxies.
With a 20.02mm eye relief, this eyepiece offers exceptional comfort, even for eyeglass wearers. Its flat field design and fully multi-coated (EMD) optics provide sharp, high-contrast views across the entire field—so your targets stay crisp from center to edge.
Engineered for durability, the 17mm is argon-purged and waterproof, protecting your view from moisture, dust, and internal fogging. It’s also ideal for using averted vision techniques to spot faint or low-contrast deep-sky objects.
CA Residents: Prop 65 WARNING(S)
⭐ Features & Benefits
- 92° hyper-wide field of view offers massive sky coverage and immersive visuals
- 20.02mm of eye relief ensures comfort—even with glasses
- Argon-purged, waterproof housing protects against fog, moisture, and dust
- Flat field optical design for sharp, edge-to-edge image clarity
- EMD-coated, edge-blackened optics for enhanced contrast and minimal reflections
- Ideal for non-tracking scopes—long drift time keeps objects in view longer
- Supports averted vision for detecting faint, elusive celestial targets
🌟 Who It’s For
- Deep sky observers seeking a balance of wide field and moderate magnification
- Eyeglass wearers wanting maximum viewing comfort
- Dobsonian and alt-az mount users who benefit from extended drift time
- Backyard astronomers and field observers needing rugged, all-weather gear
- Users who rely on averted vision to tease out subtle details in faint objects
🎯 What You’ll Be Able to See
- Extended star clusters like the Pleiades and Hercules Cluster
- Emission and reflection nebulae with rich contrast and depth
- Galaxies and edge-on spirals, captured with surprising brightness
- Large-scale lunar views with sharp definition across the surface
🎒 What’s Included
- Explore Scientific 17mm 92° Series Waterproof Eyepiece
- Bolt-style protective storage case
- Dust caps (top and bottom)
- Instructional and warranty documentation
Specs
| Item Number | EPWP9217–01 |
| Focal Length | 17mm |
| Apparent Field | 92° |
| Eye Relief | 20.02mm |
| Field Stop Diameter | 27.46mm |
| Barrel Size | 2.00" |
| Length | 152mm |
| Width | 69.8mm |
| Weight | 2.87 lbs |
| 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