{"product_id":"sky-watcher-heliostar-76ha-solar-telescope-s11315","title":"Sky-Watcher Heliostar 76Ha Solar Telescope - S11315","description":"\u003ch3 class=\"MsoNormal\" style=\"text-align: center;\"\u003eSky-Watcher Heliostar 76mm H-Alpha Solar Telescope\u003cbr\u003e\n\u003c\/h3\u003e\n\u003cp class=\"MsoNormal\"\u003eThe Sky-Watcher Heliostar 76mm H-alpha Solar Telescope brings a new light (yes, pun intended) to the Sky-Watcher family by offering a dedicated Hydrogen-alpha (Hα) solar telescope to their lineup. Hydrogen-alpha solar observing allows you to unlock the incredible dynamics of surface of the Sun far beyond what a white light solar filter can deliver. From solar prominences on the limb of the Sun (often mistakenly called 'flares'), to active sunspot regions, bright plage patches, surface granulation, wispy, snake-like plasma filaments, and more, the star of the solar system is yours to capture in breathtaking views and images.\u003c\/p\u003e\n\u003ccenter\u003e\n\u003cimg alt=\"\" src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0080\/7095\/5123\/files\/CBSAP_2015_Horizontal_Logo.png?v=1732124726\" width=\"511\" height=\"138\" style=\"font-size: 0.875rem;\"\u003e\n\u003ch4 class=\"MsoNormal\"\u003eThe Official Solar Telescope of the Charlie Bates Solar Astronomy Project\u003c\/h4\u003e\n\u003cp style=\"text-align: left;\"\u003eFounded in 2008, The \u003ca href=\"https:\/\/www.facebook.com\/groups\/91723109503\" title=\"Charlie Bates Solar Astronomy Project Facebook\"\u003eCharlie Bates Solar Astronomy Project\u003c\/a\u003e has taught observational solar astronomy and narrowband solar imaging to hundreds of thousands of people in 27 countries.\u003c\/p\u003e\n\u003ch3 class=\"MsoNormal\"\u003eDouble the Fun\u003c\/h3\u003e\n\u003cp style=\"text-align: left;\" class=\"MsoNormal\"\u003eThe Heliostar 76mm Hα Solar Telescope provides incredible double stack performance for the price of one etalon filter. There is no need for costly double stack systems, Heliostar 76Hα is tuned to \u0026lt;0.55Å natively providing rich surface detail and with its 76mm aperture high resolution viewing and imaging is easily obtainable.\u003c\/p\u003e\n\u003ch3\u003eSafety Information\u003c\/h3\u003e\n\u003cp style=\"text-align: left;\"\u003eThe Sky-Watcher Heliostar 76mm H-Alpha Solar Telescope has been lab tested here in the United States to meet the ISO 12312-2 safety standards. Each scope is tested one by one on the actual Sun to make sure each unit is ready for safe solar viewing right out of the box.\u003c\/p\u003e\n\u003cp style=\"text-align: left;\"\u003eThis is a dedicated solar telescope and will not provide views or images of anything except for the Sun. \u003cstrong\u003ePlease use an abundance of caution when observing the Sun\u003c\/strong\u003e as incorrect usage and practices can result in serious and even permanent eye damage.\u003c\/p\u003e\n\u003cp style=\"text-align: left;\"\u003eAlso, the 11.5mm blocking filter in the removable eyepiece diagonal is part of Heliostar's safety features. Do not use with any other type of diagonal.\u003c\/p\u003e\n\u003ch3 class=\"MsoNormal\"\u003eWhat's In the Box?\u003c\/h3\u003e\n\u003cp style=\"text-align: left;\" class=\"MsoNormal\"\u003eThe Heliostar 76Hα features a collection of accessories to ensure you are ready for viewing out of the box. The telescope includes:\u003c\/p\u003e\n\u003cul\u003e\n\u003cli style=\"text-align: left;\" class=\"MsoNormal\"\u003eMounting rings\u003c\/li\u003e\n\u003cli style=\"text-align: left;\" class=\"MsoNormal\"\u003eV-style dovetail\u003c\/li\u003e\n\u003cli style=\"text-align: left;\" class=\"MsoNormal\"\u003eHeliostar solar finder\u003c\/li\u003e\n\u003cli style=\"text-align: left;\" class=\"MsoNormal\"\u003eDual-speed Crayford focuser\u003c\/li\u003e\n\u003cli style=\"text-align: left;\" class=\"MsoNormal\"\u003e11.5mm blocking filter\u003c\/li\u003e\n\u003cli style=\"text-align: left;\" class=\"MsoNormal\"\u003eClip-on sunshade\u003c\/li\u003e\n\u003cli style=\"text-align: left;\" class=\"MsoNormal\"\u003e20mm 70° 1.25” eyepiece\u003c\/li\u003e\n\u003cli style=\"text-align: left;\" class=\"MsoNormal\"\u003eCamera phone adapter\u003c\/li\u003e\n\u003cli style=\"text-align: left;\" class=\"MsoNormal\"\u003eRugged carrying case\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3 class=\"MsoNormal\"\u003eHydrogen Alpha Technology\u003c\/h3\u003e\n\u003cp style=\"text-align: left;\" class=\"MsoNormal\"\u003eHydrogen Alpha (Hα) solar telescopes are specialized instruments used to observe the Sun in a specific wavelength of light—656.3 nm—which corresponds to the red line in the Balmer series of hydrogen’s emission spectrum. This wavelength is critical for studying solar phenomena like prominences, filaments, sunspots, and solar flares in great detail. Unlike standard white-light telescopes, which capture the Sun's broad spectrum, Hα solar telescopes offer a window into specific solar activity in the chromosphere, a layer of the Sun's atmosphere located just above the photosphere.\u003c\/p\u003e\n\u003ch3 class=\"MsoNormal\"\u003eEtalon Filter Technology\u003c\/h3\u003e\n\u003cp style=\"text-align: left;\"\u003eAt the heart of most Hydrogen Alpha solar telescopes lies the etalon filter, a highly precise optical device that isolates the Hα wavelength from the rest of the Sun’s emitted light. An etalon is a type of interferometer, consisting of two parallel mirrors separated by a precise distance. The etalon works by reflecting light multiple times between the mirrors, selectively allowing only wavelengths that satisfy specific resonance conditions to pass through.\u003c\/p\u003e\n\u003cp style=\"text-align: left;\"\u003eIn the case of Hα solar telescopes, the etalon is designed to transmit light at the Hα wavelength while blocking all other wavelengths. The key to the etalon’s performance lies in its ability to tune the wavelength it transmits. This is achieved by adjusting the distance between the mirrors or by slightly tilting the etalon, which changes the interference conditions. This tunability is crucial because the Sun's emission at Hα can shift slightly due to Doppler effects as material moves across the Sun’s surface and atmosphere.\u003cbr\u003e\u003c\/p\u003e\n\u003cp style=\"text-align: left;\"\u003eThere are two primary types of etalon filters used in solar telescopes: single etalon and double etalon systems.\u003c\/p\u003e\n\u003cp style=\"text-align: left;\"\u003e\u003cstrong\u003eSingle Etalon:\u003c\/strong\u003e A single etalon filter typically has a narrower bandwidth, providing high contrast for detailed solar observations but at the cost of limiting the field of view. This makes single etalon systems well-suited for viewing small, high-contrast features like prominences or filaments.\u003c\/p\u003e\n\u003cp style=\"text-align: left;\"\u003e\u003cstrong\u003eDouble Etalon:\u003c\/strong\u003e A double etalon system uses two etalon filters in tandem to improve the wavelength selectivity, reduce the overall bandwidth, and enhance the contrast and image clarity across a wider field of view. Double etalon systems are preferred for more detailed solar studies because they can offer both a sharper image and better tunability, allowing for a more accurate depiction of solar dynamics.\u003c\/p\u003e\n\u003cp style=\"text-align: left;\" class=\"MsoNormal\"\u003e\u003cstrong\u003e\u003cspan\u003eSolis Etalon Technology: \u003c\/span\u003e\u003c\/strong\u003e\u003cspan\u003e\u003c\/span\u003e\u003cspan\u003eSky-Watcher's Solis technology allows the Heliostar to achieve a 0.55A bandpass without the costly expense and complexity of a second etalon to achieve the same performance. This allows the observer to obtain detailed images of the solar disk right out of the box without any further expense. \u003c\/span\u003e\u003c\/p\u003e\n\u003cp style=\"text-align: left;\" class=\"MsoNormal\"\u003e\u003cstrong\u003e\u003cspan\u003eTrifid Tuner: \u003c\/span\u003e\u003c\/strong\u003e\u003cspan\u003e\u003c\/span\u003e\u003cspan\u003eInside the Heliostar is Sky-Watcher's Trifid tuning system. This tuner applies physical pressure to the etalon plates allowing the observer to reach the desired Hydrogen-band. The Trifid tuner uses three support veins to provide a secure tuning for the etalon. \u003c\/span\u003e\u003c\/p\u003e\n\u003ch3 style=\"text-align: left;\" class=\"MsoNormal\"\u003e\u003cspan\u003eSpecifications...\u003c\/span\u003e\u003c\/h3\u003e\n\u003ctable class=\"spec-table\"\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003eSKU\u003c\/td\u003e\n\u003ctd\u003eS11315\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003cthead\u003e\n\u003ctr\u003e\n\u003cth\u003eOptical Specifications\u003c\/th\u003e\n\u003ctd\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\u003c\/tr\u003e\n\u003c\/thead\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003eOptical Design\u003c\/td\u003e\n\u003ctd\u003eAchromatic\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eLens Coating\u003c\/td\u003e\n\u003ctd\u003eH-alpha fully multicoated\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eLens Design\u003c\/td\u003e\n\u003ctd\u003eDoublet\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eOptical Quality\u003c\/td\u003e\n\u003ctd\u003eDiffraction limited (1\/4 wave)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eCollimatable Cell\u003c\/td\u003e\n\u003ctd\u003eNo (Self Aligning Cell)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003ePrimary Aperture\u003c\/td\u003e\n\u003ctd\u003e76mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eF\/Ratio\u003c\/td\u003e\n\u003ctd\u003e8.3\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eFocal Length\u003c\/td\u003e\n\u003ctd\u003e630mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eBlocking Filter Size\u003c\/td\u003e\n\u003ctd\u003e11.5mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eSolar Image Size\u003c\/td\u003e\n\u003ctd\u003e6mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eBandpass\u003c\/td\u003e\n\u003ctd\u003e\u0026lt; 0.55Å\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003cthead\u003e\n\u003ctr\u003e\n\u003cth\u003eMechanical Specifications\u003c\/th\u003e\n\u003ctd\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\u003c\/tr\u003e\n\u003c\/thead\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003eFocuser Type\u003c\/td\u003e\n\u003ctd\u003eCrayford\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eFocuser Size\u003c\/td\u003e\n\u003ctd\u003e2\"\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eFocuser: Dual or Single Speed\u003c\/td\u003e\n\u003ctd\u003eDual speed\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eCompression Ring\u003c\/td\u003e\n\u003ctd\u003eNo* (Only on diagonal)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eOTA material\u003c\/td\u003e\n\u003ctd\u003eAluminum\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eOptical Tube length (inches)\u003c\/td\u003e\n\u003ctd\u003e24\"\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eOptical Tube weight (pounds)\u003c\/td\u003e\n\u003ctd\u003e8.4 pounds\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eMounting Rings?\u003c\/td\u003e\n\u003ctd\u003eMounting Rings\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eDovetail type\u003c\/td\u003e\n\u003ctd\u003eV-style\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003cthead\u003e\n\u003ctr\u003e\n\u003cth\u003eAccessories\u003c\/th\u003e\n\u003ctd\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\u003c\/tr\u003e\n\u003c\/thead\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003eEyepieces\u003c\/td\u003e\n\u003ctd\u003e20mm 70º 1.25\" eyepiece\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eDiagonal\u003c\/td\u003e\n\u003ctd\u003e11.5mm 1.25\" H-alpha blocking diagonal\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eCamera Adapter\u003c\/td\u003e\n\u003ctd\u003eCell phone adapter\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eAdditonal Accessories\u003c\/td\u003e\n\u003ctd\u003eSun shade\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eIncluded finder\u003c\/td\u003e\n\u003ctd\u003eHeliostar solar finder\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eManual\u003c\/td\u003e\n\u003ctd\u003eDigital PDF\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eCase\u003c\/td\u003e\n\u003ctd\u003eYes\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003cthead\u003e\n\u003ctr\u003e\n\u003cth\u003eObservational Info\u003c\/th\u003e\n\u003ctd\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\u003c\/tr\u003e\n\u003c\/thead\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003eDawes Limit\u003c\/td\u003e\n\u003ctd\u003e1.52\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eRayleigh Limit\u003c\/td\u003e\n\u003ctd\u003e1.84\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eLimiting Magnitude\u003c\/td\u003e\n\u003ctd\u003e11.88\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eMinimum Magnification\u003c\/td\u003e\n\u003ctd\u003e7x\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eMaximum Magnification\u003c\/td\u003e\n\u003ctd\u003e150x\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eMagnification with included eyepieces\u003c\/td\u003e\n\u003ctd\u003e32x\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eIntended use\u003c\/td\u003e\n\u003ctd\u003eSolar (visual \u0026amp; Imaging)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003cp style=\"text-align: left;\"\u003e\u003cem\u003ePlease Note:  Images show the Heliostar on the Sky-Watcher SolarQuest Mount, which is not included with this version of the product. Click the link if you want the Heliostar\/SolarQuest H-Alpha Solar Package instead.  \u003c\/em\u003e\u003c\/p\u003e\n\u003cp style=\"text-align: left;\"\u003e\u003cem\u003eStudio images will follow shortly.  We just wanted to offer this new solar telescope as soon as possible!  Thanks!\u003c\/em\u003e\u003c\/p\u003e\n\u003c\/center\u003e","brand":"Sky-Watcher USA","offers":[{"title":"Default Title","offer_id":41533400940657,"sku":"SWU-S11315","price":3042.95,"currency_code":"EUR","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0851\/2766\/files\/Heliostar_on_SolarQuest_Mount.jpg?v=1776459189","url":"https:\/\/khanscope.com\/fr-fr\/products\/sky-watcher-heliostar-76ha-solar-telescope-s11315","provider":"Khan Scope Centre","version":"1.0","type":"link"}