Eyepiece Beta Hyperion Zoom Mark IV 8–24mm 2"/1.25" zoom eyepiece

The Beta Hyperion Zoom Mark IV 8–24mm 2"/1.25" zoom eyepiece provides a continuous focal range from 8 mm to 24 mm for telescopes equipped with 2" or 1.25" focusers. Designed for users who want variable magnification without swapping eyepieces, this ocular uses a Mark IV optical configuration to deliver a balance of field flatness and contrast across the zoom range. The included 1.25" adapter allows quick switching between standard focuser sizes while the zoom control lets observers fine-tune framing and magnification for different targets.

Advantages

The Mark IV optical design reduces aberrations and supports comfortable viewing across the zoom range, making it suitable for high-contrast targets such as the Moon and planets as well as extended deep-sky objects. The continuous 8–24mm focal range enables seamless changes in image scale without interrupting the observation session. Compatibility with both 2" and 1.25" focusers increases versatility with a wide range of telescopes and simplifies equipment setup. The eyepiece construction includes a secure zoom mechanism and smooth eyepiece rotation for accurate framing.

Suitable for

• Planetary observation (higher magnifications near 8–12 mm)
• Lunar viewing and detailed crater studies
• Bright deep-sky objects and planetary nebulae at intermediate focal lengths
• Field scouting and framing when switching between targets
• Observers who prefer continuous zooming instead of multiple fixed eyepieces

Key specifications

• Focal length range: 8–24 mm
• Optical design: Mark IV zoom configuration
• Mount compatibility: 2" barrel with included 1.25" adapter
• Zoom control: continuous adjustment for variable magnification
• Intended use: visual astronomy for planetary, lunar and deep-sky observation

How to use

Insert the eyepiece into the telescope focuser appropriate to the chosen barrel size (2" or fitted with the 1.25" adapter). Start at the longest focal length (24 mm) to locate and center the target, then gradually reduce the focal length toward 8 mm to increase magnification and detail. Use slow, deliberate movements on the zoom control and the telescope focuser to achieve sharp focus; small adjustments to the focuser are often needed when changing focal length. Lock the focuser or eyepiece as required by your mount to maintain a stable view during observation.

Usage recommendations

For best results, pair the eyepiece with a telescope of sufficient focal length to avoid overly narrow fields at the shortest setting; for planetary work use steady seeing conditions and a stable mount. Clean optical surfaces with appropriate tools and avoid touching glass elements. When switching between 2" and 1.25" configurations, ensure the adapter is firmly seated to prevent shifts in alignment.