Pentax XW Series 1.25" Wide Angle Eyepiece - 10 mm Focal Length, 70° Field

Pentax XW10 1.25" Wide Angle Eyepiece - 10 mm Focal Length, 70° Field

Pentax XW eyepieces were designed from the beginning for outstanding performance in all areas. The image sharpness is truly exceptional, no matter whether the eyepiece is used on an f/4 Newtonian, an f/7 APO refractor or an f/15 Maksutov.

Particular care was taken to design the eyepieces for superb viewing comfort. The eyepieces are perfectly comfortable to use both with or without eyeglasses.

The state of the art SMC coating results in a very bright image (high transmission). Image sharpness remains perfectly sharp throughout the large field of view.

From the first second the eyepieces radiate a feeling of quality throughout. As such they also were made for a long lifespan. They are weatherproof according to the JIS class 4. This means, among other things, that the coating and the mechanical body are very robust.

All in all we consider Pentax XW eyepieces one of the finest choices for discriminating amateur astronomers who are looking for the best in quality and performance.

Clear, comfortable viewing assured by 70° apparent angle of view and 20 mm eye relief

All SMC Pentax XW-series eyepieces feature an extra-wide 70-degree apparent angle of view and an extra-long 20 mm eye relief to deliver an exciting, wide-perspective image. Also features an adjustable twist-up eye cup. Viewing comfort is optimized for eyeglass wearers.

High-grade optics for exceptional image quality

The high-performance XW-series optics incorporates high-refraction, extra-low-dispersion lanthanum glass elements to produce a well-balanced image with minimal aberrations. It is particularly designed to reduce the disturbing blackout effect by effectively compensating the spherical aberration of the pupil.

Pentax-original multi-layer coating for outstanding light transmission efficiency

All lens surfaces that come in contact with air are treated with original multi-layer coatings, while all laminated surfaces are treated with an innovative partial coating to offer the light transmission efficiency of more than 90 percent (an astonishing 96 percent at 550 nm) over the visible light spectrum.

Advanced light-shielding technology for improved image contrast

Thanks to Pentax’s advanced computer simulation technology, the XW series features a light-shielding diaphragm at the most effective position to drastically reduce internal reflections for a brighter, higher-contrast image.

Comprehensive lineup to accommodate all applications

Featuring functional, practical focal lengths, the XW eyepiece series provides a comprehensive lineup that accommodates all types of applications, from low-magnification viewing of stars to high-magnification observation of planets.

Weatherproof construction for all-weather viewing

The XW series features JIS Class 4 weatherproof construction, making it possible to use it in drizzle or under night dew. However, please note that the XW-series eyepieces are not designed for underwater use and should not be submerged under water.

Standard eyepiece barrel size and built-In adapter-mounting thread

The XW series provides a choice of two installment diameters: standard 31.7 mm (1.25") version, and 50.8 mm (2") version. When you remove the screw-on eyecup, the XW30-R and XW40-R models provide a screw thread with 48 mm diameter and 0.75 pitch, while other models provide a screw thread with 43 mm diameter and 0.75 pitch.

Safety informations: PDF Download