{"id":12213,"date":"2025-12-02T20:31:32","date_gmt":"2025-12-02T19:31:32","guid":{"rendered":"https:\/\/deep-space-astronomy.ch\/?post_type=product&p=12213"},"modified":"2026-01-19T18:50:32","modified_gmt":"2026-01-19T17:50:32","slug":"sky-watcher-heliostar-100ha","status":"publish","type":"product","link":"https:\/\/deep-space-astronomy.ch\/en\/product\/sky-watcher-heliostar-100ha\/","title":{"rendered":"Sky-Watcher HELIOSTAR-100Ha"},"content":{"rendered":"

Sky-Watcher HELIOSTAR 100H\u03b1 - 100 mm H-alpha solar telescope<\/h3>\n

Visit Sky-Watcher HELIOSTAR 100 H\u03b1<\/strong> is a high-performance H-alpha sunglass from 100 mm opening<\/strong>, for demanding solar observers and astrophotographers. Thanks to its 0.5 \u00c5 or better<\/strong>, It reveals the activity of the solar surface and its chromosphere in remarkable detail.<\/p>\n

Supplied complete with 22 mm 70\u00b0 wide-field eyepiece<\/strong>a 90\u00b0 solar prism<\/strong> and a solar-powered viewfinder\u00a0integrated<\/strong>, making it a turnkey instrument for observing and imaging the Sun in H-alpha.<\/p>\n

H-alpha solar observation<\/h3>\n

Observing the Sun in hydrogen-alpha (H\u03b1)<\/strong> reveals a dynamic range and richness of detail impossible to see with a simple white-light solar filter.<\/p>\n

In H-alpha, you can admire :<\/p>\n

    \n
  • Visit protuberances<\/strong> at the edge of the disc (often mistakenly called \u201cflares\u201d).<\/li>\n
  • Visit active regions<\/strong> associated with sunspots.<\/li>\n
  • Visit granulation<\/strong> of the surface.<\/li>\n
  • Visit filaments<\/strong> of plasma, thin and serpentine, crossing the disc.<\/li>\n<\/ul>\n

    By observing the Sun in the very narrow H-alpha bandwidth, the astronomer benefits from spectacular, real-time views of our star in all its majesty.<\/p>\n

    Filtration technology and optical safety<\/h3>\n

    L\u2019HELIOSTAR-100H\u03b1<\/strong> uses several technologies to protect the human eye during solar observation. It incorporates :<\/p>\n

      \n
    • A infrared reflection film<\/strong> to reduce the thermal load.<\/li>\n
    • A special heat-blocking filter<\/strong>.<\/li>\n
    • A UV blocking filter<\/strong> to prevent harmful radiation from reaching the observer.<\/li>\n<\/ul>\n

      A combination of front and rear filters<\/strong> allows only monochromatic light at the wavelength of 656.28 nm<\/strong>, emitted by hydrogen atoms, while rigorously blocking other wavelengths. The result: highly contrasted chromospheric protuberances and details in the H-alpha line.<\/p>\n

      Solis technology and 0.5 \u00c5 bandwidth<\/h3>\n

      The technology Solis Etalon<\/strong> from Sky-Watcher, the HELIOSTAR-100H\u03b1 achieves a high bandwidth of 0.5 \u00c5<\/strong> without the complexity and cost of a second standard.
      \nThe observer thus obtains detailed images of the solar disk straight out of the box, without having to invest in a double standard.<\/p>\n

      Visit standard setting <\/strong>is achieved by a system of pressure tuning<\/strong>, with fine tuning of the bandwidth to optimize the contrast of solar structures.<\/p>\n

      Safety compliance<\/h3>\n

      Visit HELIOSTAR-100H\u03b1<\/strong> complies with the transmission requirements of the ISO 12312-2:2015<\/strong> (Filters for direct solar observation). Always follow the manufacturer's instructions and basic safety rules when observing the Sun.<\/p>\n

      Important safety information<\/h3>\n

      Solar observation requires a maximum caution<\/strong>. Incorrect use may cause severe or even permanent eye damage.<\/p>\n

      Visit 20 mm blocking filter<\/strong> located in the removable solar bend gearbox is an integral part of the safety device<\/strong> of the HELIOSTAR.<\/p>\n

      Never use this telescope with any other type of angle drive.<\/strong> or without the filter block specifically designed for this instrument.<\/p>\n

      Equipment included<\/h3>\n
        \n
      • HELIOSTAR 100H\u03b1 solar telescope<\/strong> (OTA only).<\/li>\n
      • 22 mm, 70\u00b0 UltraWide (1.25\u2033) eyepiece<\/strong>.<\/li>\n
      • Solar elbow 90\u00b0 (1.25\u2033)<\/strong> with integrated 20 mm blocking filter.<\/li>\n
      • Integrated Solar Guider<\/strong>.<\/li>\n
      • Crayford 2\u2033 dual-speed focuser<\/strong>.<\/li>\n
      • Pipe clamps<\/strong> with integrated carrying handle<\/strong>.<\/li>\n
      • 45 mm dovetail bar<\/strong> with 1\/4\u2033-20 tripod threads.<\/li>\n
      • Rigid suitcase<\/strong> transport and protection.<\/li>\n<\/ul>\n

        Optical & mechanical characteristics<\/h3>\n
          \n
        • Primary opening<\/strong> 100 mm.<\/li>\n
        • Telescope focal length<\/strong> : 800 mm.<\/li>\n
        • Focus report<\/strong> : f\/8.<\/li>\n
        • Magnification with eyepiece included<\/strong> 36.4\u00d7 (22 mm).<\/li>\n
        • Supplied eyepiece<\/strong> 22 mm, apparent field 70\u00b0 (1.25\u2033).<\/li>\n
        • Stallion<\/strong> bandwidth < 0.5 \u00c5.<\/li>\n
        • Setting method<\/strong> : pressure tuning<\/em>.<\/li>\n
        • Integrated technologies<\/strong> Sky-Watcher Trifid Tuner & Solis Etalon.<\/li>\n
        • Filter block outlet opening<\/strong> 20 mm.<\/li>\n
        • Filter block<\/strong> 20 mm (integrated into the solar bend).<\/li>\n
        • Solar angle drive<\/strong> : 90\u00b0, 1,25\u2033.<\/li>\n
        • Solar Guider<\/strong> integrated.<\/li>\n
        • Focuser<\/strong> : Crayford 2\u2033 double speed.<\/li>\n<\/ul>\n

          Back focus & imaging<\/h3>\n
            \n
          • Back focus<\/strong> : 20 mm (OTA).<\/li>\n
          • Imaging<\/strong> : suitable for imaging with camera and 1.25\u2033 adapter with 60 mm back focus.<\/li>\n
          • Solar image size<\/strong> 7.6 mm.<\/li>\n<\/ul>\n

            Physical data & compliance<\/h3>\n
              \n
            • Safety compliance<\/strong> : ISO 12312-2:2015.<\/li>\n
            • Tube length (OTA)<\/strong> 760 mm.<\/li>\n
            • Tube weight (OTA)<\/strong> weight : 6 kg.<\/li>\n
            • Delivery<\/strong> telescope supplied in a rigid suitcase<\/strong>.<\/li>\n<\/ul>","protected":false},"excerpt":{"rendered":"

              Sky-Watcher HELIOSTAR 100H\u03b1 \u2013 T\u00e9lescope solaire H-alpha 100 mm La Sky-Watcher HELIOSTAR 100 H\u03b1 est une lunette solaire H-alpha hautes performances de 100 mm d\u2019ouverture, destin\u00e9e aux observateurs et astrophotographes solaires exigeants. Gr\u00e2ce \u00e0 sa bande passante de 0,5 \u00c5 ou mieux, elle r\u00e9v\u00e8le avec une finesse remarquable l\u2019activit\u00e9 de la surface solaire et de […]<\/p>\n","protected":false},"featured_media":12214,"comment_status":"open","ping_status":"closed","template":"","meta":[],"product_brand":[822],"product_cat":[816,643,642],"product_tag":[],"class_list":["post-12213","product","type-product","status-publish","has-post-thumbnail","product_brand-sky-watcher","product_cat-nouveautes","product_cat-lunettes-solaires","product_cat-materiel-pour-lobservation-solaire","first","on_supplier","taxable","shipping-taxable","purchasable","product-type-simple"],"_links":{"self":[{"href":"https:\/\/deep-space-astronomy.ch\/en\/wp-json\/wp\/v2\/product\/12213","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/deep-space-astronomy.ch\/en\/wp-json\/wp\/v2\/product"}],"about":[{"href":"https:\/\/deep-space-astronomy.ch\/en\/wp-json\/wp\/v2\/types\/product"}],"replies":[{"embeddable":true,"href":"https:\/\/deep-space-astronomy.ch\/en\/wp-json\/wp\/v2\/comments?post=12213"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/deep-space-astronomy.ch\/en\/wp-json\/wp\/v2\/media\/12214"}],"wp:attachment":[{"href":"https:\/\/deep-space-astronomy.ch\/en\/wp-json\/wp\/v2\/media?parent=12213"}],"wp:term":[{"taxonomy":"product_brand","embeddable":true,"href":"https:\/\/deep-space-astronomy.ch\/en\/wp-json\/wp\/v2\/product_brand?post=12213"},{"taxonomy":"product_cat","embeddable":true,"href":"https:\/\/deep-space-astronomy.ch\/en\/wp-json\/wp\/v2\/product_cat?post=12213"},{"taxonomy":"product_tag","embeddable":true,"href":"https:\/\/deep-space-astronomy.ch\/en\/wp-json\/wp\/v2\/product_tag?post=12213"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}