Baader Hyperion 21mm 1.25" & 2" Eyepiece

The Baader Hyperion 21mm Eyepiece is a versatile wide-angle eyepiece designed to deliver bright, immersive views for amateur astronomers who value comfort, contrast, and flexibility. As part of Baader Planetarium’s highly regarded Hyperion range, the 21mm focal length is particularly well suited to deep-sky observing, open clusters, nebulae, and wide lunar views.

Wide-Field Views for Deep-Sky Observing

With a 68-degree apparent field of view, this eyepiece provides a generous and engaging window into the night sky, making it easier to frame large celestial objects and maintain them in view during manual tracking. The moderate magnification offered by the 21mm focal length makes it ideal for sweeping star fields and observing extended deep-sky targets.

High-Contrast Optics with Phantom Group Coatings

The optical design incorporates high-quality multi-layer Phantom Group coatings, which enhance light transmission while suppressing internal reflections and ghosting. This results in improved contrast, darker backgrounds, and sharp detail across the field of view, even when observing faint celestial objects.

Dual 1.25" & 2" Compatibility

A key advantage of the Baader Hyperion 21mm is its dual-format barrel design, allowing seamless use in both 1.25-inch and 2-inch focusers without the need for additional adapters. This makes it compatible with a wide range of telescopes, including refractors, Dobsonians, and catadioptric systems.

Comfortable for Extended Observing Sessions

Designed for long observing sessions, the eyepiece offers a comfortable 20mm eye relief, making it suitable for both eyeglass and non-eyeglass wearers. Its solid mechanical construction and modular design also allow integration with other Baader accessories for customised observing setups.

Combining wide-field performance, optical precision, and user comfort, the Baader Hyperion 21mm 1.25" & 2" Eyepiece is a dependable, high-quality choice for astronomers looking to expand their eyepiece collection with a premium, future-proof option.