Long-Focal-Length Eyepieces, Ideal for Nebula and Star Cluster Observations

Thanks to their long-focal-length design, the new XW30-R and XW40-R eyepieces will let you observe large celestial bodies spreading across the night sky, such as the Pleiades star cluster and the Andromeda Galaxy, in their entirety. *
* When mounted on an astronomical telescope with a focal length of 1000mm.

Clear, Comfortable Viewing Assured by 70° Apparent Angle of View and 20mm Eye Relief

All smc PENTAX XW-series eyepieces feature an extra-wide 70-degree apparent angle of view and an extra-long 20mm eye relief to deliver an exciting, wide-perspective image.

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.