Pentax XW 10mm Eyepiece
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Vai al moduloPENTAX XW 10mm – Wide-angle eyepiece with 70° apparent field of view, 20mm eye relief, and waterproof housing.
The PENTAX XW 10mm eyepiece is designed to deliver outstanding performance for both astronomy and nature observation with spotting scopes. Its wide field of view and long eye relief provide bright, sharp images free of unwanted reflections.
Main Features
- 10mm focal length, ideal for detailed planetary, lunar, and deep-sky observations
- 70° apparent field of view for an immersive observing experience
- 20mm eye relief, perfectly suited for eyeglass wearers
- Lanthane glass elements with high refractive index and low dispersion to minimize aberrations
- PENTAX SMC multi-coating ensures outstanding light transmission (over 90%, up to 96% at 550nm)
- Optimized internal diaphragm reduces reflections and enhances image contrast
- Waterproof design – JIS Class 4, resistant to rain and nighttime humidity
- Compatible with 1.25" astronomical telescopes and PENTAX spotting scopes
- Removable eyecup with 43mm / 0.75mm thread for optional adapter use
Superior Optical Quality
Thanks to lanthane glass and advanced optical design, the XW 10mm delivers perfectly balanced, high-resolution images with minimal aberrations. The design eliminates blackout effects, ensuring comfortable and stable observation.
Outstanding Light Transmission
All air-to-glass surfaces are treated with exclusive PENTAX multi-coatings. Bonded surfaces receive an advanced partial coating, achieving over 90% light transmission across the visible spectrum, with peak performance up to 96% at 550nm.
Waterproof, Durable Design
With JIS Class 4 waterproofing, the eyepiece ensures reliable use even in challenging weather conditions such as light rain and high humidity. (Not suitable for underwater use).
Technical Specifications
| Series | PENTAX XW |
| Model | XW 10mm |
| Focal Length | 10mm |
| Apparent Field of View | 70° |
| Eye Relief | 20mm |
| Glass Material | Lanthane high-refractive, low-dispersion glass |
| Optical Coatings | PENTAX SMC multi-coating + advanced partial coating |
| Waterproofing | JIS Class 4 (rain and humidity resistant) |
| Barrel Size | 1.25" standard |
| Adapter Thread | 43mm / 0.75mm pitch |