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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.
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.
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.
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).
| 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 |
