BETA Hyperion Zoom Mark IV 8-24mm 2/1.25 inch Eyepiece

Zoom eyepieces often force observers to choose between convenience and optical quality, but the BETA Hyperion Zoom Mark IV eliminates that compromise. This eyepiece delivers a continuous 8-24 mm focal length range with a dual 1.25" and 2" barrel, allowing you to adapt to changing seeing conditions without swapping eyepieces.

Who is it for

Visual astronomers who want a single premium eyepiece for a wide range of magnifications, from wide-field sweeping to high-power planetary viewing. It is also well suited for binoviewing and for use with spotting scopes that accept astronomical eyepieces.

Main features

• Zoom range 8-24 mm with click stops at 8, 12, 16, 20, and 24 mm for repeatable settings
• Dual barrel design fits both 1.25" and 2" focusers without adapters
• Apparent field of view from 68° at 8 mm to 48° at 24 mm
• Constant 15 mm eye relief for comfortable viewing with or without glasses
• Baader Phantom Group™ multi-coatings for high transmission and contrast
• Foldable rubber eyecup and anodized aluminum housing
• M43 filter thread on the eyepiece side and M54 thread on the 2" barrel for photo/video adaptation

Specifications

• Eyepiece type: Zoom
• Focal length range: 8-24 mm
• Apparent field of view: 68° at 8 mm, 48° at 24 mm
• Eye relief: 15 mm (constant)
• Optical design: 7 elements in 4 groups
• Lens coatings: Baader Phantom Group™ multi-coatings
• Barrel compatibility: 1.25" and 2"
• Filter threads: M43 (eyepiece side), M54 (2" barrel side)
• Click stops: 8, 12, 16, 20, 24 mm
• Housing material: Anodized aluminum
• Eyecup: Foldable rubber
• Parfocal: Nearly parfocal
• Telecentricity: Near-telecentric at 24 mm
• Photo/video adapter compatibility: Yes (via M43/M54 threads)

Tips

For high-power viewing, start at 24 mm to center the object, then zoom to shorter focal lengths. The click stops help you track magnification changes. When using the 2" barrel, the M54 thread allows direct connection of camera adapters for afocal photography.