Eyepiece Pentax XW 14 2 cm Black Japan

The Pentax XW 14 eyepiece with a 2 cm focal length is a compact, high-performance optical accessory made in Japan for spotting scopes and telescopes. It combines a wide apparent field of view with extended eye relief to support comfortable observation sessions. The eyepiece incorporates fully multi-coated lens surfaces and high-refraction lanthanum glass elements to maximize light transmission, improve color fidelity and deliver sharp, high-contrast images with minimal optical aberrations. Weatherproof construction meeting JIS Class 4 standards ensures reliable use in varied outdoor conditions.

Advantages

The XW 14 offers a 70° apparent field of view and approximately 20 mm of eye relief, providing an expansive and comfortable viewing experience for both ground and astronomical targets. Fully multi-coated optics increase light throughput and color accuracy while high-refraction lanthanum glass reduces chromatic and spherical aberrations for improved resolution. Its compact dimensions make it easy to handle and store, and the JIS Class 4 weatherproofing enhances durability during outdoor use.

Suitable for (tasks / use cases)

• Planetary and lunar observation with telescopes
• Wide-field views of star fields and deep-sky objects
• Birdwatching and terrestrial observation with spotting scopes
• Field research and outdoor observational work in variable weather

Key specifications

• Focal length: 20 mm
• Apparent field of view: 70°
• Eye relief: ~20 mm
• Optical design: multi-element with high-refraction lanthanum glass
• Lens coatings: fully multi-coated surfaces
• Construction: JIS Class 4 weatherproof housing
• Physical dimensions: approximately 188 mm width × 85 mm depth × 100 mm height
• Color: black

How to use

Install the eyepiece into the focuser or eyepiece holder of a compatible PENTAX spotting scope or telescope, ensuring it is securely seated. Begin with low to medium magnification to locate the target, then adjust focus using the instrument’s focuser until the image is sharp. Position your eye at the eyepiece to take advantage of the approximately 20 mm eye relief; for eyeglass wearers, maintain a comfortable distance to view the full 70° field. After use, retract any protective caps and store the eyepiece in a dry, padded case.

Usage recommendations

For best optical performance, clean coated lens surfaces only with a blower, soft brush and appropriate lens tissue or cloth. When using the eyepiece for astronomy, allow your telescope to thermally acclimate to outdoor temperature for improved image stability. In wet or dusty environments use the weatherproof features and protective caps to extend the eyepiece’s service life.