{"id":10133,"date":"2025-08-27T19:36:42","date_gmt":"2025-08-27T17:36:42","guid":{"rendered":"https:\/\/deep-space-astronomy.ch\/?post_type=product&p=10133"},"modified":"2025-08-27T19:39:10","modified_gmt":"2025-08-27T17:39:10","slug":"daystar-quark-calcium-h-line","status":"publish","type":"product","link":"https:\/\/deep-space-astronomy.ch\/en\/product\/daystar-quark-calcium-h-line\/","title":{"rendered":"DayStar Quark - Calcium H-line"},"content":{"rendered":"

 <\/p>\n

Daystar Quark Calcium H-line<\/h1>\n

<\/p>\n

Description<\/h2>\n

Visit Quark Calcium H-line<\/strong> takes the practical, all-in-one concept of the original Quark, but optimized for the stingray Calcium H (397 nm)<\/strong>.<\/p>\n

Designed for F\/7 or more<\/strong>It allows both amateur and advanced astronomers to easily explore solar activity in Calcium.<\/p>\n

Why choose Calcium H?<\/h2>\n

Stingrays Calcium H<\/strong> and Calcium K<\/strong> offer almost identical views of the solar surface.
\nHowever, many older astronomers do not perceive the K spectrum (393 nm) well. This is why the H-line (397 nm) is recommended for visual observation:
\nthe longer wavelength makes it accessible to a larger number of observers.<\/p>\n

With this filter, you can see :<\/p>\n

    \n
  • active regions and shiny beaches,<\/li>\n
  • faculae and structures close to sunspots,<\/li>\n
  • the chromospheric network in contrast.<\/li>\n<\/ul>\n

    Key features<\/h2>\n\n\n\n\n\n\n\n\n\n\n
    Features<\/th>\nDetail<\/th>\n<\/tr>\n
    Wavelength<\/td>\nCalcium H - 397 nm<\/td>\n<\/tr>\n
    Bandwidth (FWHM)<\/td>\n\u2248 5 \u00c5 (variable according to instrument)<\/td>\n<\/tr>\n
    Compatible refractors<\/td>\nF\/7 or higher (shorter possible with Powermate 2x-2.5x)<\/td>\n<\/tr>\n
    Design<\/td>\nAll-in-one, lightweight eyepiece format<\/td>\n<\/tr>\n
    Power supply<\/td>\nUSB, 5V 1.5A, low power consumption (optional portable battery)<\/td>\n<\/tr>\n
    Compatible ERF filters<\/td>\nNo red or yellow glass. Recommended: UV\/IR cut filter<\/td>\n<\/tr>\n
    Optical treatment<\/td>\nAR coatings optimized for 397 nm, internal baffling<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n

    Safety and recommendations<\/h2>\n
      \n
    • A energy rejection filter (ERF)<\/strong> adapted to the telescope is required for safe use.<\/li>\n
    • The Calcium Quark cannot be used with a front-mounted ERF<\/strong> of the instrument.<\/li>\n
    • The use of a UV\/IR cut filter is strongly recommended to protect the optics and the observer.<\/li>\n<\/ul>\n

      Summary<\/h2>\n

      Visit Daystar Quark Calcium H-line<\/strong> makes solar observation in Calcium accessible, simple and affordable,
      \nwith sufficient brightness for most observers and excellent compatibility with standard refractors.
      \nIt's an ideal educational and scientific tool for exploring chromospheric phenomena.<\/p>\n

      * The Quark is a product of DayStar Instruments, using Fabry-P\u00e9rot etalon technology.<\/p>\n

       <\/p>","protected":false},"excerpt":{"rendered":"

        Daystar Quark Calcium H-line Description Le Quark Calcium H-line reprend le concept pratique et tout-en-un du Quark original, mais optimis\u00e9 pour la raie Calcium H (397 nm). Con\u00e7u pour les r\u00e9fracteurs de F\/7 ou plus, il permet aux astronomes amateurs et confirm\u00e9s d\u2019explorer facilement l\u2019activit\u00e9 solaire en Calcium. Pourquoi choisir la raie Calcium H […]<\/p>\n","protected":false},"featured_media":10134,"comment_status":"open","ping_status":"closed","template":"","meta":[],"product_brand":[834],"product_cat":[816,645,642,70],"product_tag":[],"class_list":{"0":"post-10133","1":"product","2":"type-product","3":"status-publish","4":"has-post-thumbnail","6":"product_brand-daystar","7":"product_cat-nouveautes","8":"product_cat-filtres-solaires","9":"product_cat-materiel-pour-lobservation-solaire","10":"product_cat-reducteurs-et-extendeurs-de-focale","12":"first","13":"on_supplier","14":"taxable","15":"shipping-taxable","16":"purchasable","17":"product-type-simple"},"_links":{"self":[{"href":"https:\/\/deep-space-astronomy.ch\/en\/wp-json\/wp\/v2\/product\/10133","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=10133"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/deep-space-astronomy.ch\/en\/wp-json\/wp\/v2\/media\/10134"}],"wp:attachment":[{"href":"https:\/\/deep-space-astronomy.ch\/en\/wp-json\/wp\/v2\/media?parent=10133"}],"wp:term":[{"taxonomy":"product_brand","embeddable":true,"href":"https:\/\/deep-space-astronomy.ch\/en\/wp-json\/wp\/v2\/product_brand?post=10133"},{"taxonomy":"product_cat","embeddable":true,"href":"https:\/\/deep-space-astronomy.ch\/en\/wp-json\/wp\/v2\/product_cat?post=10133"},{"taxonomy":"product_tag","embeddable":true,"href":"https:\/\/deep-space-astronomy.ch\/en\/wp-json\/wp\/v2\/product_tag?post=10133"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}