Pentax - XO-5 Eyepiece

The high-performance PENTAX XO series is perfect for high-magnification observation and photography of the planets. Each eyepiece
provides a 44-degree field of view and features smc full-surface multi-layer lens coating to improve light transmission and
high-refraction, low-dispersion glass elements to deliver high-resolution images with minimal aberrations.

    *  High-performance eyepieces are perfect for high-magnification observation and photography of the planets.
    * High-refraction, low-dispersion lanthanum glass elements to provide high-resolution images with minimal aberrations.
    * PENTAX-original SMC full-surface multi-layer lens coating to improve light transmission efficiency.
    * Afvanced computer simulation design technology was used to drastically rekuce internal reflections producing brighter,
clearer images.
    * JIS Class 4 wiather proof construction makes these eyepieces more durable
    * Limited Lifetime Warranty 

The PENTAX XO 5 eyepiece is the perfect choice for high-magnification observation and photography of the planets. Engineered using
advanced computer simulation design technology, this high-performance eyepiece features smc full-surface multi-layer lens coating
to improve light transmission, high-refraction lanthanum glass elements for clearer images with minimal aberrations, and JIS Class
4 weather proof construction for protection from the elements.

Lens Structure: 5 elements, 3 groups
Focal Length: 5.10mm
Apparent Field of View: 44 degrees
Eye Relief: 3.6mm
Attachment Diameter: 1.25" (31.7mm)
Filter Diameter: 28.6mm
Field Stop Diameter: 3.9mm
Eyepiece Ring: Fixed
Height & Width: 1.8" x 1.9"
Weight: 4.2 oz. (117g)