Pentax XW 30 20mm Black eyepiece

12.192 cm (4.8 ") x 3.0", 740g, black The PENTAX XW 30 eyepiece provides a focal length of 30mm, long eye relief (20mm), and is exclusively designed for astronomical observations. Within its JIS Class 4 weather-proof construction, this high-performance eyepiece features high-refraction, low-dispersion lanthanum glass elements and PENTAX-original multi-layer coating for bright, high-resolution images with minimal aberrations and distortions. The PENTAX XW 30 eyepiece is compatible with telescopes that feature a 2 inch focuser.