Lunt Zoom Eyepiece (7.2–21.5 mm) – Flat-Field

• One eyepiece, many targets: continuously zoom from 21.5 mm to 7.2 mm to frame full-disk solar, lunar vistas, and tight planetary detail without swapping eyepieces

• Flat-field design delivers edge-to-edge clarity—great for solar limb sweeps, sunspot groups, and crisp lunar/planetary work after dark

• Ultra-low reflectance: coated with 0.1% anti-reflective layers—the same coating spec used on Lunt etalons—for high contrast and minimal ghosting

• Day or night ready: tuned for H-alpha, CaK, and white-light observing, and equally at home on lunar, planetary, and deep-sky targets

• 1.25" barrel integrates with most focusers/diagonals and keeps your solar/nightside kit lightweight and balanced

• Comfortable 15 mm eye relief supports relaxed, long sessions and quick outreach focusing

Specifications

• Focal Length Range: 7.2 mm – 21.5 mm (continuous zoom)

• Barrel Size: 1.25"

• Optics: 7 lenses / 4 groups, flat-field design

• Coatings: 0.1% anti-reflective coatings (same spec as Lunt etalons)

• Apparent Field of View: ~53° at 7.2 mm, ~40° at 21.5 mm

• Eye Relief: 15 mm

• Diameter / Height: 47 mm / 82 mm

• Use Cases: Solar (H-alpha, CaK, white light) and nighttime (lunar, planetary, general observing)

What’s in the Box?

• Lunt 7.2–21.5 mm Flat-Field Zoom Eyepiece

• Protective dust caps