Pentax XW 5mm Eyepiece
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Vai al moduloPentax XW 5mm Eyepiece – Wide 70° Field with 20mm Eye Relief
The Pentax XW 5mm eyepiece delivers exceptional performance with a wide 70° apparent field of view, a long 20mm eye relief, and a waterproof construction. Perfect for use in astronomy and with Pentax spotting scopes.
Compatible with 1.25" and 2" focusers, this eyepiece combines high-grade optics, advanced coatings, and modern engineering to provide bright, high-contrast, and glare-free images.
Main Features
- 70° apparent field of view for an immersive observing experience.
- 20mm eye relief for maximum comfort, even with glasses.
- Lanthanum glass elements with high refractive index and low dispersion.
- PENTAX SMC multi-coating plus special laminated surface treatment.
- Light transmission >90%, reaching 96% at 550nm.
- Optimized diaphragm design reduces internal reflections for higher contrast.
- Waterproof to JIS Class 4, protecting against rain and humidity.
- 43mm / 0.75mm adapter thread available when eyecup is removed.
High-End Optics
The XW series uses lanthanum glass elements that minimize aberrations and deliver a perfectly balanced image with outstanding color fidelity. The design effectively compensates for spherical aberration of the exit pupil, reducing blackout effects.
Exclusive Pentax Multi-Coating
All air-to-glass surfaces are coated with Pentax’s SMC multi-layer coating, while laminated surfaces receive an innovative partial coating. This ensures light transmission above 90%, with an impressive peak of 96% at 550nm within the visible spectrum.
Durable & Waterproof Construction
With a JIS Class 4 waterproof rating, this eyepiece is resistant to light rain and nighttime humidity, ensuring reliable performance in all conditions. Not designed for underwater use.
Technical Specifications
| Series | Pentax smc XW |
| Focal Length | 5 mm |
| Apparent Field of View | 70° |
| Eye Relief | 20 mm |
| Optical Glass | Lanthanum glass, high refractive index, low dispersion |
| Coating | SMC multi-coating + special laminated surface treatment |
| Light Transmission | >90% (96% at 550nm) |
| Compatibility | Pentax spotting scopes & telescopes with 1.25"/2" focusers |
| Adapter Thread | 43 mm / 0.75 mm (with eyecup removed) |
| Waterproof | JIS Class 4 (not for underwater use) |
Why Choose the Pentax XW 5mm?
- Ideal for high-resolution planetary and lunar observing.
- Comfortable 20mm eye relief for long sessions.
- Excellent color fidelity and high contrast.
- Durable, weather-resistant construction.