Product Overview

The Pentax Eyepiece XW-23 is built for long, comfortable sessions behind the glass. With a 23mm focal length, huge 85° apparent field of view and generous 20mm eye relief, it gives you a wide, high-contrast window on the world without forcing you to crowd the eyepiece. Whether it’s bolted onto a Pentax spotting scope or riding on your telescope, the XW-23 delivers sharp star images and crisp detail right to the edge of the field, even in ordinary Aussie conditions – drizzle, dew and all.

Pentax’s lanthanum glass optics and full multi-coatings keep transmission high and aberrations low, so faint nebulae, star clusters and distant wildlife stand out cleanly against a dark background. The 2" barrel with safety undercut slots straight into modern focusers, and the weather-resistant JIS Class 4 build means you don’t have to baby it when the forecast is marginal. If you want a workhorse wide-angle eyepiece that just gets on with the job and lets you see more, the XW-23 is the one you’ll keep coming back to.

Key Features

• 23mm focal length eyepiece delivers a versatile medium magnification, ideal for both deep-sky observing and detailed terrestrial viewing.
• Extra-wide 85° apparent field of view provides an immersive, panoramic image, making large nebulae, star clusters and landscapes easier to frame and study.
• Generous 20mm eye relief (12mm from the rubber eyecup) ensures comfortable viewing for extended sessions, including for users who wear glasses.
• High-grade lanthanum glass optics with 7 elements in 5 groups minimise aberrations, delivering sharp, high-contrast images across the entire field.
• Fully multi-coated optical surfaces and advanced light-shielding diaphragm boost light transmission and reduce internal reflections for brighter views in low-light conditions.
• JIS Class 4 weather-resistant construction allows confident use in drizzle, dew and changing outdoor conditions without compromising performance.
• 2" (50.8mm) barrel with safety undercut offers secure mounting and compatibility with a wide range of telescopes and spotting scopes.
• Helicoid-type adjustable eyecup and light shield let you fine-tune eye position, improving comfort and helping maintain optimal contrast.
• Compact 76mm x 125mm housing and 770g weight balance well on most setups, providing stability without making the system front-heavy.
• Precision Japanese manufacture and robust mechanical build quality support long-term reliability for serious astronomical and nature observation.