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IMPORTANT: Our store is located in Canada. All orders that include products manufactured outside of Canada or USA will be subject to tariffs and duties, regardless of the order value. US customers are responsible for all applicable duties and tariffs, and those will be billed by the carrier, except for the Lacerta upgrade kit, for which we collect them at checkout.
Lunt 60° 8mm Flat-Field Eyepiece - 1.25"
Lunt 60° 8mm Flat-Field Eyepiece - 1.25"
Lunt 60° 8mm Flat-Field Eyepiece - 1.25"

Lunt 60° 8mm Flat-Field Eyepiece - 1.25"

by Lunt Solar Systems
SKU LSS-LS8E
$89.00 - $89.00
$89.00
$89.00 - $89.00
$89.00
Price Match Policy!
  • 8mm Focal Length
  • 60° Apparent Field of View
  • Flat-Field Optical Design
  • Optimized for H-Alpha Solar Viewing
  • 1.25" Barrel Diameter
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  • Description
  • FAQ
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  • In the Box
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  • Warranty

  • Lunt 60° 8mm Flat-Field Eyepiece - 1.25"

    The Lunt 60° 8mm Flat-Field Eyepiece is engineered specifically for high-magnification solar observation, delivering an expansive 60° apparent field of view in a standard 1.25" barrel. Its optical design prioritizes a flat field and maximum contrast on hydrogen-alpha targets by using specialized coatings to suppress internal reflections that plague standard eyepieces when viewing the Sun.

    A 60° Flat Field for Edge-to-Edge Solar Detail

    With an 8mm focal length, this eyepiece provides the high power needed to resolve fine details in prominences, filaments, and active regions. The 60° flat-field design ensures this sharpness is maintained across the entire field of view, preventing the distortion and curvature that can soften details at the solar limb in simpler eyepiece designs. This allows you to track a feature from one edge of the field to the other without refocusing.

    Solar-Optimized Coatings for Maximum H-Alpha Contrast

    Viewing the Sun presents a unique challenge: managing the intense, concentrated light to prevent ghosting and internal reflections that wash out delicate surface detail. This eyepiece uses the same advanced anti-reflective coatings found on Lunt's own internal etalons. These coatings are optimized to reduce reflections, ensuring the faint structures within a solar prominence or the texture of granulation stand out against a dark background.

    Lunt 8mm vs. Standard Eyepieces for Solar Observing

    While a standard 8mm Plössl is a capable nighttime eyepiece, it reveals its limitations under the Sun. A standard Plössl is less expensive but typically offers a narrower 50-52° apparent field and often produces distracting internal reflections or "ghosts" when aimed at the Sun, even through a dedicated solar telescope.

    • Field of View: The Lunt's 60° field provides a more immersive view and makes it easier to frame larger prominence structures compared to the more constrained view of a typical Plössl.
    • Contrast: The Lunt's specialized coatings are its primary advantage, delivering a higher-contrast image with a darker background, which is critical for discerning faint details in H-alpha.
    • Field Flatness: The flat-field optics of the Lunt 8mm keep the entire solar limb sharp, whereas a standard eyepiece may show noticeable softness away from the center of the view.

  • What makes the coatings on the Lunt 8mm Flat-Field eyepiece special for solar use?

    The Lunt 8mm eyepiece uses the same anti-reflective coatings as Lunt's internal solar etalons. This design aggressively suppresses internal reflections and ghosting caused by the Sun's intense brightness, resulting in higher contrast and a darker background sky, which is essential for seeing faint details in prominences and surface granulation.

    How does the Lunt 8mm perform on solar prominences in a Lunt 60mm telescope?

    In a Lunt 60mm H-alpha telescope (which typically has a 500mm focal length), the Lunt 8mm eyepiece yields approximately 63x magnification. This is an excellent power for framing and resolving detailed structure in solar prominences and large filaments, while the eyepiece's 60° flat field ensures the view remains sharp right to the edge of the solar disk.

    Will the flat-field design of the Lunt 8mm eyepiece make a difference on the full solar disk?

    Yes. While the 8mm focal length is generally too high-powered to view the entire solar disk at once in most Lunt telescopes, the flat-field design is critical for observing features near the limb. It ensures that prominences and spicules at the edge of the Sun remain as sharply focused as the details in the center of your field of view, eliminating the need to constantly adjust focus as you scan the limb.

    Is the Lunt 8mm eyepiece suitable for nighttime deep-sky or planetary viewing?

    While it is optimized for solar viewing, the Lunt 8mm eyepiece can certainly be used for nighttime observation. Its flat-field characteristics are beneficial for resolving globular clusters or planetary details. However, its primary design advantage lies in its specialized coatings for H-alpha light, which provide the most significant benefit during solar observation.

    Can I use the Lunt 8mm eyepiece with a white-light solar filter on my nighttime telescope?

    Yes. The Lunt 8mm eyepiece will perform very well for white-light solar viewing when used with a safe, full-aperture solar filter on a standard nighttime telescope. Its anti-reflection coatings will help improve contrast on sunspots and granulation, just as they do in H-alpha.

    Why choose a 60° apparent field of view for the Lunt 8mm eyepiece?

    The 60° apparent field of view offers a more immersive and comfortable observing experience than narrower ~50° designs. At the high magnification provided by the 8mm focal length, this wider field makes it easier to frame large, complex solar features and track them as the Sun moves across the sky without feeling like you are looking through a narrow tunnel.

  • SKU LS8E
  • Lunt Solar Systems 5-Year Warranty