Pentax smc XW 3.5 Eyepiece Summary
The Pentax XW 3.5 is the most powerful focal length eyepiece in the XW series with unsurpassed optical clarity and a 70 degree field of view.
Features
- High-refraction, low-dispersion Lanthanum glass.
- Pentax Super Multi-Coatings (SMC) on all air/glass surfaces.
- Edge-blackened optics and optimised baffles minimise internal reflections.
- Optically corrected for use with focal ratios as fast as f/4.
- 20mm eye-relief and twist-up rubber-rimmed eyecups – perfect for spectacle wearers.
- Chromed barrels threaded to accept filters.
- Weatherproof to JIS Class 4 standards.
Specifications
| Lens Structure: |
8 elements, 5 groups |
| Focal Length: |
3.5mm |
| Apparent Field of View: |
70 degrees |
| Eye Relief: |
20mm |
| Attachment Diameter: |
1.25″ (31.7mm) |
| Filter Diameter: |
28.6mm |
| Field Stop Diameter: |
4.3mm |
| Eyepiece Ring: |
Helicoid type |
| Height & Width: |
5.4″ x 2.4″ |
| Weight: |
14.3 oz. (405g) |
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