Internal double-stack module for select Lunt modular telescopes Dramatically narrows the final system bandpass for maximum contrast Reveals fine chromospheric detail on the solar disk User-installable design requires no factory return Fully reversible, does not affect nighttime telescope configuration Description FAQ Specifications In the Box Downloads Warranty Lunt Internal Double Stack Module for LS152THa The Lunt LFPT Internal Double Stack Module is the definitive high-contrast upgrade for Lunt's largest modular solar telescopes. By adding a second, new-generation etalon inside the optical path, this module narrows the system's final bandpass to an extremely fine level. This significant reduction in bandpass delivers the highest-contrast Hydrogen-alpha views possible, transforming the solar disk into a landscape of intricate, dynamic detail. The Internal Double-Stack Etalon: Maximum Solar Contrast The core of this module is a second, precision-tuned etalon designed to work in series with your telescope's primary etalon. This "double stacking" drastically reduces the amount of off-band light reaching the eyepiece, which darkens the solar background and makes faint structures on the chromosphere stand out in bold relief. Each etalon is individually tested and verified on precision metrology equipment to ensure it meets its design specifications. Research-Grade Chromosphere: Resolving Plage and Network Structure With the extreme bandpass reduction of the LFPT module, the Sun's chromosphere becomes a subject of genuine scientific study. The increase in contrast moves beyond simple prominences to reveal the complex magnetic architecture of active regions. You can resolve the fine internal organization of bright plage, trace the delicate threads of filaments against the disk, and resolve individual elements of the intergranular network. A Reversible Upgrade for Lunt Modular Telescopes This module is engineered for straightforward user installation, eliminating the need to send your telescope back to the factory for an upgrade. It can be purchased with a new telescope or added at any time, making it a flexible investment in your solar observing. The upgrade is also fully reversible; once the internal solar module is removed for nighttime use, the telescope performs exactly as it did before installation. Single vs. Double-Stack: Visualizing the High-Contrast Advantage A standard single-stacked Lunt telescope provides excellent views of solar prominences, which are bright features seen against the blackness of space. However, seeing faint details on the face of the Sun itself requires suppressing the overwhelming brightness of the chromosphere. This is the primary function of the double-stack module. By dramatically increasing contrast across the disk, it makes the intricate, low-contrast tapestry of filaments, plage, and active regions visible where they would otherwise be lost in the glare. What is the main visual difference after installing the Lunt Double Stack Module on my LS152THa? The primary difference is a dramatic increase in contrast on the surface of the Sun. While a single-stacked view is excellent for prominences at the Sun's edge, the Lunt Double Stack Module excels at revealing finer, lower-contrast details on the solar disk itself, such as filaments, plage, and the complex structure within active regions. Do I need to send my Lunt LS152THa telescope to the factory to install this module? No. The Lunt LFPT Internal Double Stack Module is designed to be user-installable. This allows you to upgrade your telescope at any time without the cost and downtime of shipping it for factory service. Will adding the Lunt Internal Double Stack Module affect my LS130MT's performance for nighttime astronomy? No, it will not. The internal module is part of the solar assembly. When you configure your Lunt modular telescope for nighttime use, the solar components are removed, and the telescope operates as a standard night-sky instrument with its original optical characteristics. Why is a narrower bandpass better for viewing the Sun's surface with the Lunt Double Stack Module? The Sun's surface, or chromosphere, is incredibly bright. Faint details are easily lost in this glare. A narrower bandpass, achieved by "double stacking" etalons, rejects more of this off-band light. This darkens the view slightly but significantly boosts contrast, making subtle features visible. Can I see more detail in a large solar flare with the Lunt Double Stack Module on an LS152THa? Yes. The enhanced contrast provided by the Lunt Double Stack Module is ideal for observing the complex, ribbon-like structures within a solar flare. While a single-stack system will show the event, the double-stack reveals finer details and the flare's connection to surrounding active regions on the solar disk more clearly. Is the Lunt Double Stack Module useful for imaging the Sun with my LS130MT? Absolutely. The high-contrast view is a major advantage for solar imagers. The Lunt Double Stack Module allows cameras to capture the same faint surface details that become visible to the eye, resulting in images with significantly more surface texture, filamentary detail, and active region complexity. SKU DSII/LS130T GTIN LFPT/LS152mm Lunt Internal Double Stack Module (LFPT) × 1 Download Manual Lunt Solar Systems 5-Year Warranty
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