Orion Lanthanum Eyepiece

This eyepiece uses a standard 2-inch barrel size. It will fit any telescope focuser designed to accept 2-inch accessories, but it will not fit telescopes limited to 1.25-inch focusers without a specific adapter.

The 20mm eye relief is designed for comfort, allowing you to see the entire field of view without pressing your eye directly against the lens. This is particularly beneficial if you wear eyeglasses while observing, as it provides enough distance to view comfortably without removing them.

With its 80-degree apparent field of view and 20mm focal length, this eyepiece is excellent for wide-field observation. It is well-suited for scanning large star clusters, nebulae, and sweeping views of the Milky Way, offering an immersive 'spacewalk' experience.

The 8-element design is engineered to correct aberrations and distortions across the wide 80-degree field of view. This results in sharper, more consistent image quality from the center of the view all the way to the edges.

Yes, the fully multi-coated optics significantly reduce internal reflections and light scattering. This maximizes light transmission, which helps produce brighter, higher-contrast images, especially when observing faint deep-sky objects.