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Lunt 100mm Ha Etalon Filter - Discontinued
Lunt 100mm Ha Etalon Filter - Discontinued
Lunt 100mm Ha Etalon Filter - Discontinued

Lunt 100mm Ha Etalon Filter - Discontinued

by Lunt Solar Systems
SKU LSS-LS100FHA
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CA$6,293.00 - CA$6,293.00
CA$6,293.00
CA$6,293.00 - CA$6,293.00
CA$6,293.00
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  • 100mm Hydrogen-alpha Etalon Filter
  • Enables Double-Stacking on Compatible Telescopes
  • Dramatically Increases Solar Surface Contrast
  • Designed for Lunt LS100MT and LS100THa Models
  • Thread-on Application for Easy Installation
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  • Description
  • FAQ
  • Specifications
  • In the Box
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  • Warranty

  • Lunt 100mm Ha Etalon Filter

    This Lunt 100mm Ha Etalon Filter is the key to unlocking the highest-contrast solar views possible from a Lunt LS100MT or LS100THa telescope. By adding this second etalon to the optical path, you "double-stack" the system, significantly narrowing the bandpass to suppress the bright photosphere and reveal the intricate, subtle details of the Sun's chromosphere. This accessory transforms your 100mm Lunt telescope into a dedicated instrument for observing fine surface granulation, filamentary structure, and active region plage with enhanced definition.

    The Power of Double-Stacking: Enhanced H-alpha Contrast

    A standard single-stack solar telescope provides breathtaking views of prominences on the solar limb. However, to see the maximum detail on the Sun's disk, a narrower filter bandpass is required. This 100mm etalon achieves that by adding a second stage of filtration, effectively darkening the background and causing the delicate structures within the chromosphere to stand out in sharp relief.

    The trade-off for this dramatic increase in contrast is a slightly dimmer image, which is a fundamental consequence of a narrower bandpass. For a 100mm aperture instrument, however, the light-gathering power is more than sufficient to support this high-contrast configuration for both visual observation and imaging.

    Seamless Integration with Lunt 100mm Telescopes

    This etalon was engineered specifically as a double-stacking accessory for the Lunt LS100MT and the legacy LS100THa solar telescopes. It is designed to thread directly onto the front of these instruments, making installation and removal a simple process. This allows you to easily switch between a brighter, single-stacked view for prominences and a higher-contrast, double-stacked view for surface detail, depending on your observing goals for the day.

    Please Note: This is a discontinued product and is no longer in production. This page serves as a reference for owners or those who may find this component on the used market. It is not compatible with telescopes other than the Lunt 100mm models specified.

  • What does the Lunt 100mm Ha Etalon Filter do?

    This is a secondary Hydrogen-alpha filter used to "double-stack" a compatible Lunt solar telescope. Adding it to the light path narrows the filter's bandpass, which significantly increases the contrast of details on the Sun's surface, such as filaments, plage, and granulation. The view becomes more three-dimensional.

    Which Lunt telescopes is this 100mm filter compatible with?

    This 100mm etalon is specifically designed for use with the Lunt LS100MT and the original Lunt LS100THa solar telescopes. It is not designed to be used as a standalone filter or with other telescope models.

    What visual difference will I see when adding this 100mm filter to my LS100THa?

    When you add this filter to your LS100THa, you will notice an immediate and dramatic increase in surface detail on the Sun's disk. While a single-stack view is excellent for bright prominences on the limb, the double-stacked view makes the web of filaments and active regions across the surface "pop" with much greater clarity and contrast against a darker background.

    Why is this Lunt 100mm etalon discontinued?

    Manufacturers periodically update their product lines with new designs, technologies, or to streamline their offerings. While this specific model is no longer in production, its function as a double-stacking etalon remains a core feature of Lunt's current high-end solar telescope systems.

    Can I use this 100mm etalon on a non-Lunt telescope?

    No. This etalon is part of a carefully matched system. It requires a Lunt LS100MT or LS100THa, which has the primary etalon and the necessary blocking filter. Using it on another telescope would be unsafe and would not produce a usable image.

    Will this filter help me see solar flares on the Sun's limb?

    This filter's primary benefit is for surface detail. For viewing prominences and flares on the limb, a single-stack configuration (without this filter attached) is often preferred because it provides a brighter image. You can easily attach or remove this filter to optimize the view for either surface detail (double-stacked) or limb detail (single-stacked).

  • Aperture 100mm
    Filter Type Hydrogen-alpha Front-Mounted Etalon
    Primary Use Double-Stacking Solar Telescopes
    Compatibility Lunt LS100MT, Lunt LS100THa
    Status Discontinued
  • Lunt Solar Systems 5-Year Warranty