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Lunt 7.2mm - 21.5mm Zoom Eyepiece

Original price $238.00 - Original price $238.00
Original price
$238.00 - $238.00
Current price $238.00
In stock

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Lunt 7.2mm - 21.5mm Zoom Eyepiece - LS7-21ZE-S

Experience the universe in unparalleled detail with the Lunt Zoom Eyepiece, offering a versatile focal length ranging from 7.2mm to 21.5mm.

Crafted with precision optics and 0.1% anti-reflective coatings akin to those found on our renowned etalons, this eyepiece ensures breathtaking clarity and high-contrast views, whether exploring celestial wonders at night or studying the intricate features of the Sun.

Designed with a 1.25″ barrel, this eyepiece seamlessly integrates into standard telescopes, enhancing observational adaptability.

Its compact form factor conceals a powerhouse of versatility, enabling astronomers to effortlessly adjust magnification levels for a diverse range of cosmic observations.


  • Zoom Functionality: The eyepiece's zoom capability spans from 7.2mm to 21.5mm, offering a variable focal length. This feature enables users to adjust magnification levels effortlessly, providing a spectrum of viewing options within a single eyepiece for convenient and adaptable observations.
  • Advanced Coating Technology: Lunt flat-field eyepieces boast 0.1% anti-reflective coatings, a technology synonymous with the coatings used on our precision etalons. This advanced coating minimizes reflections and glare, ensuring optimal light transmission and enhancing image clarity for unparalleled celestial observations.
  • Versatility in Observations: Tailored for both nighttime stargazing and solar viewing, these eyepieces offer a dual-purpose functionality. From gazing at distant galaxies to observing the dynamic features of the Sun, this eyepiece caters to a wide range of astronomical interests and occasions.
  • Universal Barrel Size: Featuring a 1.25″ barrel diameter, these eyepieces are designed for seamless integration into standard telescope setups. The universal barrel size ensures compatibility with various telescope models, making it hassle-free to incorporate into existing equipment configurations.
  • Optimized Image Quality: Built with a focus on delivering superior image quality, these eyepieces ensure minimized optical aberrations and distortion. Enjoy distortion-free views across the entire field, allowing for precise and detailed observations of celestial objects and solar phenomena.
  • Enhanced Astronomical Experience: Elevate your astronomical experience with an eyepiece that combines cutting-edge coating technology, versatile functionality, and compatibility, promising exceptional clarity and adaptability for astronomers of all levels.


What's Included:

✓ Lunt 7.2mm - 21.5mm Zoom Eyepiece

 Rubber Cap 

✓ Limited 5 Year Warranty



  • Focal length: 7.2 mm – 21.5 mm
  • Barrel size: 1.25″
  • Diameter: 47 mm
  • Height: 82 mm
  • Eye relief: 15 mm
  • Lenses / Groups: 7 lenses / 4 Groups
  • Field of View: 7.2 mm – 53° – 21.5 mm – 40°


Customer Reviews

Based on 4 reviews
A C.
Better than expected

Bought this zoom to accompany my Lunt Solar telescope. Very nice eye relief and is perfect for telescope.

Unexpected, better than hoped for.

Specs seem to be as described. Purchased for use on the Lunt solar scope. Limited to comparing against only one other zoom from an established major brand and few mid to higher end fixed focal length EPs(Pentax XW, Baader Morpheus, ES). Optical quality for a mid priced lens is more or less on par with the fixed focal length EPs. Vastly superior to the zoom it replaced. At least for the shape of my eye socket/face, the eyecup forms a good seal against ambient light for solar viewing. 3 position to allow accommodation for individual differences in eye relief distances. Recommend if you don’t mind the relatively narrow field of views and not parafocal. Potentially nice zoom for binoviewers. Light, compact. Something under consideration.

Price is a bit on the high end if the look alike clones are identical. Only niggle is the stiff zoom ring. Really need to clamp down hard on the twist lock or compression ring screws of the 2-1.25” adapters.

In addition to H-alpha solar observation. Using it on the refractor for Lunar observation. Solid zoom for that application.

Terry S.
Great zoom lens

Great zoom lens for a great solar scope. Do much easier than switching out lenses for magnifying for detail

michael s.
Amazing eyepiece

This is the first 'Zoom" eyepiece I have ever tried and I couldn't be happier! To go from low to high power with a simple twist is really nice. The views are crisp and sharp throughout the entire range with no backlash at all. Highly recommend this eyepiece!