Eyepiece Beta Hyperion 10mm 2 inch/1.25 inch with 68° field of view

The Beta Hyperion 10mm eyepiece is a dual-format 2"/1.25" optical accessory for telescopes that provides a 68° apparent field of view and a 10 mm focal length. Designed for visual observation, this eyepiece fits standard 2-inch focuser barrels and includes an adapter for 1.25-inch use, allowing compatibility with a wide range of amateur and semi-professional telescopes. The combination of a relatively short focal length and a wide apparent field delivers higher magnification while preserving a comfortable viewing window for detailed observation of planets, lunar features and brighter deep-sky objects.

Advantages

The Beta Hyperion 10mm combines dual-size compatibility with a wide 68° apparent field of view to offer enhanced versatility for different telescope setups. Its 10 mm focal length increases angular magnification compared with longer eyepieces, while the wide field reduces the sense of tunnel vision and supports easier target acquisition. The design enables comfortable eye relief for extended observation sessions and straightforward swapping between 2" and 1.25" configurations without major modifications to the telescope.

Suitable for

• Planetary observation and detailed lunar studies at higher magnification
• Bright deep-sky objects where increased magnification and a wider field help frame targets
• Observers who switch between 2" and 1.25" eyepiece standards
• Replacing standard kit eyepieces to achieve improved sharpness and field of view

Key specifications

• Focal length: 10 mm
• Apparent field of view: 68°
• Dual barrel format: compatible with 2" focusers and 1.25" via adapter
• Intended use: visual astronomical observation
• Optical design: multi-element eyepiece (wide-field type)

How to use

Insert the eyepiece directly into the telescope's 2" focuser or use the supplied 1.25" adapter for focusers and diagonals that accept the smaller barrel. Bring the target into the telescope's field by using a low-power eyepiece first, then switch to the Beta Hyperion 10mm to increase magnification and refine focus. Adjust the focuser and any included eyecup to obtain comfortable eye relief and the sharpest possible image. For best results, allow the telescope to reach thermal equilibrium and ensure collimation is correct for reflecting optics.

Recommendations

Use the Beta Hyperion 10mm for medium-to-high power observing on nights with good seeing; pair it with a stable mount and accurate tracking for planetary work. When observing extended deep-sky objects, consider starting with a wider, lower-power eyepiece to locate the target, then switch to the 10mm to examine structure and detail. Store the eyepiece in a padded case when not in use and keep optical surfaces clean using appropriate lens-care tools.