Baader Planetarium · Eyepiece
Baader Hyperion 21mm
Wide-field performance at a fair price, the Hyperion 21mm delivers 68 degrees of sharp, well-corrected sky.
Price updated Mar 29, 2026
Performance Scores
Overview
The Baader Hyperion 21mm is a serious wide-field eyepiece aimed at amateurs who want quality optics without paying more than their telescope cost. The 21mm focal length makes it a natural choice for low-power, wide-field views, whether you are scanning open clusters, large nebulae, or simply getting your bearings in an unfamiliar part of the sky. The 68-degree apparent field of view gives you a genuinely immersive view without the distortion that plagues cheaper wide-angle designs.
Fully multi-coated optics help transmission and contrast hold up well, which matters when you are chasing faint extended objects like galaxies or emission nebulae. One genuinely useful feature is the modular design, which allows the eyepiece to be disassembled for use as a photo eyepiece or adapted with Baader's T-2 accessories, giving it some flexibility beyond visual use. At $196, it sits in a competitive price bracket alongside options from Explore Scientific and Celestron.
The 12 Amazon reviews are a small sample, though the 4.9 rating suggests consistent user satisfaction. Edge sharpness and eye relief are strong enough to satisfy most observers, including eyeglass wearers.
At a Glance
21mm
Focal Length
Specifications
Key Features
- 68-degree apparent field of view provides wide, immersive views with minimal distortion toward the edges
- Fully multi-coated optics improve light transmission and contrast on faint deep-sky targets
- Modular design allows disassembly for afocal photography or connection to Baader T-2 accessories
- 21mm focal length works well for low-power, wide-field scanning across most telescope types
- Comfortable eye relief suits observers who wear eyeglasses during sessions
- Solid build quality reflects Baader Planetarium's reputation for durable, precise optical components
Customer Reviews
12 reviews
Baader - Lente oculare Hyperion da 21 mm Provato su Celestron Regal m2 100 ED e Su vecchio rifrattore 120x1500. Risultati di nitidezza notevole, leggerissimi artefatti al bordo, grande luminosità e praticamente assenza di "fantasmi". Un oculare al vertice nella sua fascia di prezzo, e anche oltre. U...
Vorher hatte ich ein Vixen LVW 22 auf meinem Zeiss Spektiv und das war fotografisch scharf bis an den Bildrand. Allerdings störte mich die grünliche Farbtönung und im Gegenlicht gab es Reflexe, die den Kontrast stark minderten. Deshalb erwarb ich das Hyperion 21mm. Das Okular ist voll tauglich für T...
Gran ocular, muy versátil pudiendo convertirse en un 2" de 32m.m quitando el primer grupo de lentes. Todo conforme, muy buen producto y Amazon como siempre cumple muy bien. Lo recomiendo a todo aquel que este buscando algo de este tipo.