Deep sky observers consistently reach for eyepieces in the 30mm focal length range—and for good reason. This low-power, wide-field eyepiece excels at capturing faint galaxies, nebulae, and expansive star fields, flooding your fully dilated eye with as much light as your telescope can provide. It's also highly effective in poor seeing conditions, delivering crisp, low-magnification views when higher powers falter.
Engineered with a flat-field, multi-element optical layout, this 52° Series eyepiece offers high contrast, long eye relief, and outstanding clarity—far surpassing traditional Plössls in the same price class. Whether you're scanning the Milky Way, tracking down Messier objects, or navigating wide-field regions, the 30mm is a must-have for any serious observer’s collection.
Its argon-purged waterproof housing resists internal fogging and contamination, while the removable silicone eyecup provides ergonomic comfort and glare control. The 1.25" barrel with double taper ensures a secure fit in most telescope focusers.
CA Residents: Prop 65 WARNING(S)
🌟 Features & Benefits
- 30mm focal length ideal for low-power deep sky observation and widefield sweeps
- 52° apparent field of view with a true-field experience for star hopping and extended targets
- 27.2mm field stop diameter captures broad celestial vistas
- Generous 19.9mm eye relief for relaxed, eyeglass-friendly viewing
- Flat-field optical design using 4 elements in 2 groups for edge-to-edge sharpness
- EMD-coated and edge-blackened optics for maximum contrast and reduced glare
- Argon-purged and waterproof to prevent internal fog and maintain optical clarity
- 1.25" barrel with double taper for smooth insertion and compatibility with standard filters
- Removable flip-down silicone eyecup for adjustable eye positioning and comfort
- Optimized for averted vision to reveal faint deep sky detail
🎯 Who It’s For
- Visual astronomers looking for a true field eyepiece for locating and observing large objects
- Deep sky enthusiasts chasing galaxies, nebulae, and open clusters
- Observers who wear glasses and need long eye relief
- Anyone seeking a step up from Plössls without jumping to ultra-wide designs
🔭 What You’ll Be Able to See
- The Milky Way's dense star clouds in brilliant context
- Faint Messier objects, even in modest aperture scopes
- Large nebulae and galaxy groupings under dark skies
- Subtle structure in extended deep sky objects, aided by averted vision techniques
🎒 What’s Included
- Explore Scientific 30mm 52° Series Waterproof Eyepiece
- Protective dust caps (top and bottom)
- Flip-down silicone eyecup
- Soft carrying pouch
Specs
| Item Number | EPWP5230–01 |
|---|---|
| Focal Length | 30mm |
| Apparent Field of View | 52° |
| Eye Relief | 19.9mm |
| Field Stop Diameter | 27.2mm |
| Optical Elements / Groups | 4 Elements in 2 Groups |
| Lens Coatings | EMD (Enhanced Multi-Layer Deposition) |
| Barrel Size / Type | 1.25" O.D. / Double Taper |
| Filter Thread | Standard 1.25" (1.125" x 42 TPI) |
| Waterproofing | Argon Purged; O-Ring Sealed |
| Test Rating | Submersible to 1 Meter for 30 Minutes |
| Eyecup | Removable Flip-Down Silicone Rubber |
| Size (L x W) | 75.5mm x 47.8mm |
| Weight | 204.1g (7.2 oz.) |
| Materials | Optical Glass, Aluminum, Steel, Rubber |
| Markings | Laser Engraved: Focal Length, Series, Serial Number, Brand |
Warranty Information
This product is covered by a Limited One-Year USA Warranty, valid when registered within 60 days of purchase. To activate your warranty, please visit the Explore Scientific website and complete the registration form at: