{"product_id":"sky-watcher-heliostar-100-mm-h-alpha-solar-telescope-s11325","title":"Sky-Watcher HelioStar 100 mm H-Alpha Solar Telescope - S11325","description":"\u003ch3 class=\"MsoNormal\" style=\"text-align: center;\"\u003eSky-Watcher Heliostar 100mm H-Alpha Solar Telescope Highlights...\u003cbr\u003e\n\u003c\/h3\u003e\n\u003cp style=\"text-align: center;\"\u003e\u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0851\/2766\/files\/S11325_Heliostar100H__OTA_LeftFront.webp?v=1776108069\" alt=\"\" width=\"446\" height=\"448\"\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003eDouble stack performance at a single stack price\u003c\/li\u003e\n\u003cli\u003e100mm aperture\u003c\/li\u003e\n\u003cli\u003e760mm focal length\u003c\/li\u003e\n\u003cli\u003ef\/7.6\u003cbr\u003e\n\u003c\/li\u003e\n\u003cli\u003eIntegrated Heliostar solar finder, tube rings, and carry handle\u003c\/li\u003e\n\u003cli\u003eIntegrated Trifid Tuner and Solis Etalon Technology\u003c\/li\u003e\n\u003cli\u003e\u0026lt;0.5Å bandpass\u003c\/li\u003e\n\u003cli\u003eH-alpha fully multicoated lens\u003c\/li\u003e\n\u003cli\u003eAchromatic doublet design\u003c\/li\u003e\n\u003cli\u003e2.8-inch dual-speed Rack and Pinion focuser\u003c\/li\u003e\n\u003cli\u003e20mm, 1.25” diagonal format blocking filter\u003c\/li\u003e\n\u003cli\u003eWeight: 13.2 lbs.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp class=\"MsoNormal\"\u003e\u003cstrong\u003eThe Heliostar 100mm H-alpha Solar Telescope\u003c\/strong\u003e brings a new light (yes, pun intended) to the Sky-Watcher family by offering a dedicated Hydrogen-alpha (Hα) solar telescope to the 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 massive solar prominences and dancing spicules on the limb of the Sun, to active sunspot regions where solar flares erupt, 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\u003ch3 class=\"MsoNormal\"\u003eDouble the Fun\u003c\/h3\u003e\n\u003cp class=\"MsoNormal\"\u003e\u003cem\u003eThe Heliostar 100mm Hα Solar Telescope provides incredible double stack performance for the price of one etalon filter.\u003c\/em\u003e There is no need for costly double stack systems, Heliostar 100Hα is tuned to \u0026lt;0.5Å natively providing rich surface detail and with its 100mm aperture high resolution viewing and imaging is easily obtainable.\u003c\/p\u003e\n\u003ch3\u003eSafety Information\u003c\/h3\u003e\n\u003cp\u003eThe Sky-Watcher Heliostar 100mm Hα 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\u003eThis is a dedicated solar telescope and will not provide views or images of anything except for the Sun.\u003cspan\u003e \u003c\/span\u003e\u003cstrong\u003ePlease use an abundance of caution when observing the Sun\u003c\/strong\u003e\u003cspan\u003e \u003c\/span\u003eas incorrect usage and practices can result in serious and even permanent eye damage.\u003c\/p\u003e\n\u003cp\u003eAlso, the 20mm, 1.25-inch 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 class=\"MsoNormal\"\u003eThe Heliostar 100Hα features a collection of accessories to ensure you are ready for safe solar viewing right out of the box.\u003c\/p\u003e\n\u003cp class=\"MsoNormal\"\u003eThe solar telescope, with dual-speed rack \u0026amp; pinion focuser, includes these accessories:\u003c\/p\u003e\n\u003cul\u003e\n\u003cli class=\"MsoNormal\"\u003eMounting rings\u003c\/li\u003e\n\u003cli class=\"MsoNormal\"\u003eV-style dovetail\u003c\/li\u003e\n\u003cli class=\"MsoNormal\"\u003eHeliostar solar finder\u003c\/li\u003e\n\u003cli class=\"MsoNormal\"\u003e20mm blocking filter\u003c\/li\u003e\n\u003cli class=\"MsoNormal\"\u003eClip on sunshade\u003c\/li\u003e\n\u003cli class=\"MsoNormal\"\u003e22mm 70° 1.25” eyepiece\u003c\/li\u003e\n\u003cli class=\"MsoNormal\"\u003e2\" eyepiece adapter\u003c\/li\u003e\n\u003cli class=\"MsoNormal\"\u003eRugged carrying case\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3 class=\"MsoNormal\"\u003eHydrogen Alpha Technology\u003c\/h3\u003e\n\u003cp 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 emission line in the “A” alpha absorption band of the Balmer series. This wavelength is critical for studying solar phenomena like spicules, 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\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\u003eIn the case of Hα solar telescopes, the etalon is designed to transmit light at the Hα wavelength while rejecting all other wavelengths. The key to the etalon’s performance lies in its ability to tune the wavelength allowed through the filter. This is achieved by adjusting the distance between the mirrors or by slightly tilting the etalon, which changes the angle of incidence. Tuning the etalon to each side of the central wavelength is needed because local changes in atmospheric pressure change the refractive index of your local air mass.   The Sun's emission at Hα can also shift slightly due to Doppler effects as violent explosions in the Sun's chromosphere can cause solar plasma to move at enormous speeds. \u003cbr\u003e\u003c\/p\u003e\n\u003cp\u003eThere are two primary types of etalon filters used in solar telescopes: single etalon and double etalon systems.\u003c\/p\u003e\n\u003cp\u003eTraditional H alpha solar telescopes have been sold in two basic configurations; single etalon and the very costly double etalon systems.  It has always been a choice of the single etalon's brighter prominences or more contrast of surface features from an additional etalon.  The second etalon has the unfortunate consequence of reducing the brightness of the system by a whopping 40%.\u003cbr\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eSolis Etalon Technology™:\u003c\/strong\u003e\u003cspan\u003e \u003c\/span\u003eSky-Watcher's all new 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 or better performance without reducing the brightness significantly. This allows the observer to see very high contrast detailed images of the solar chromosphere right out of the box without any further expense.  \u003cbr\u003e\u003c\/p\u003e\n\u003cp 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 Tuner™ system. This tuner applies physical pressure to the etalon plates allowing the observer to reach the desired Hydrogen emission line. The Trifid tuner uses three support veins to provide a secure tuning for the etalon without stressing any peripheral systems.\u003c\/span\u003e\u003c\/p\u003e\n\u003ctable class=\"spec-table\"\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 (achro or apo)\u003c\/td\u003e\n\u003ctd\u003eAchromatic\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eLens Coating (fully multi-coated)?\u003c\/td\u003e\n\u003ctd\u003eH-alpha fully multicoated\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eLens design (doublet, triplet or Quad)\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 (mm)\u003c\/td\u003e\n\u003ctd\u003e100mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eF\/Ratio\u003c\/td\u003e\n\u003ctd\u003e7.6\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eFocal Length (mm)\u003c\/td\u003e\n\u003ctd\u003e760mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eBlocking Filter Size\u003c\/td\u003e\n\u003ctd\u003e20mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eSolar Image Size\u003c\/td\u003e\n\u003ctd\u003e7.6mm\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\u003eRack \u0026amp; Pinion\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eFocuser Size\u003c\/td\u003e\n\u003ctd\u003e2.8\"\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\u003e30\"\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eOptical Tube weight (pounds)\u003c\/td\u003e\n\u003ctd\u003e13.2 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\u003e22mm 70º 1.25\" eyepiece\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eDiagonal\u003c\/td\u003e\n\u003ctd\u003e20mm 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\u003eNo\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eAdditonal Accessories\u003c\/td\u003e\n\u003ctd\u003eSun shade \u0026amp; 2\" adapter\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\u003e1.16\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eRayleigh Limit\u003c\/td\u003e\n\u003ctd\u003e1.4\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eLimiting Magnitude\u003c\/td\u003e\n\u003ctd\u003e12.48\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eMinimum Magnification\u003c\/td\u003e\n\u003ctd\u003e14x\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eMaximum Magnification\u003c\/td\u003e\n\u003ctd\u003e197x\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eMagnification with included eyepieces\u003c\/td\u003e\n\u003ctd\u003e35x\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eLight Gather (compared to next size down)\u003c\/td\u003e\n\u003ctd\u003e73% compared to Heliostar 76Ha\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","brand":"Sky-Watcher USA","offers":[{"title":"Default Title","offer_id":43130088521841,"sku":"SKY-S11325","price":8330.0,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0851\/2766\/files\/S11325_Heliostar100H__OTA_LeftFront.webp?v=1776459070","url":"https:\/\/khanscope.com\/fr\/products\/sky-watcher-heliostar-100-mm-h-alpha-solar-telescope-s11325","provider":"Khan Scope Centre","version":"1.0","type":"link"}