These eyepieces are specially designed to offer an excellent field of view while the fully multi-coated lenses increase light transmission and color quality. The XW30-R and the XW-40R are the perfect eyepieces for viewing the nebula, planets and exploring the night sky.
The Pentax Eyepiece SMC XW Tube offers a 70 degree field of view for easier viewing. All of our eyepieces are constructed with a high-refraction, low-dispersion lanthanum glass that consistently delivers bright, high-resolution images with minimal distortion. In addition, all XW series eyepieces are built to JIS Class 4 weather-proof standards which increases their durability in less than ideal conditions. Designed for use with a wide range of telescopes and PENTAX brand spotting scopes, the XW series eyepieces are a clear choice for ground and astronomical applications.
High-performance wide angle eyepieces for ultra clear astronomical viewing - 85° Apparent Angle of View
The PENTAX XW series 85° Apparent Angle combined with 20mm of Eye Relief produces some the widest and most relaxed viewing possible with your telescope.
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 the original multi-layer coating, while all laminated surfaces are treated with the innovative partial coating, to offer the light transmission efficiency of more than 90 percent (an astonishing 96 percent at 550nm) 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.
Sleeve Size and Eyecup Design
The XW series provides a choice of two diameter to suit practically all telescope fousers: American-standard 31.7mm version (1.25"), and 50.8mm (2") version.
When you remove the screw-on eyecup, it also provides a screw thread with a 43mm diameter and a 0.75 pitch
High-performance wide angle eyepieces for ultra clear astronomical viewing - 85° Apparent Angle of View
The PENTAX XW series 85° Apparent Angle combined with 20mm of Eye Relief produces some the widest and most relaxed viewing possible with your telescope.
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 the original multi-layer coating, while all laminated surfaces are treated with the innovative partial coating, to offer the light transmission efficiency of more than 90 percent (an astonishing 96 percent at 550nm) 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.
Sleeve Size and Eyecup Design
The XW series provides a choice of two diameter to suit practically all telescope fousers: American-standard 31.7mm version (1.25"), and 50.8mm (2") version.
When you remove the screw-on eyecup, it also provides a screw thread with a 43mm diameter and a 0.75 pitch
