{"id":10108,"date":"2025-08-27T17:54:13","date_gmt":"2025-08-27T15:54:13","guid":{"rendered":"https:\/\/deep-space-astronomy.ch\/?post_type=product&p=10108"},"modified":"2026-09-24T10:59:21","modified_gmt":"2026-09-24T08:59:21","slug":"daystar-quark","status":"publish","type":"product","link":"https:\/\/deep-space-astronomy.ch\/en\/product\/daystar-quark\/","title":{"rendered":"DayStar Quark \u2013 Chromosphere or Prominence (please specify when ordering)"},"content":{"rendered":"
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Daystar QUARK, the H-alpha filter that turns your telescope into a solar telescope<\/h1>\n

The Daystar QUARK<\/strong> est un v\u00e9ritable filtre ha qui tient dans la main et se glisse dans un renvoi coud\u00e9 comme un simple oculaire. Pourtant, il embarque tout ce qu’il faut pour observer le Soleil en H-alpha (656 nm) : un Barlow t\u00e9l\u00e9centrique 4.2\u00d7 optimis\u00e9 pour cette longueur d’onde, un \u00e9talon Fabry-P\u00e9rot, un blocage int\u00e9gr\u00e9 et les adaptateurs 1,25″ et 2″ pour s’int\u00e9grer \u00e0 votre mat\u00e9riel existant.Apr\u00e8s v\u00e9rification de la compatibilit\u00e9 et installation de la filtration de protection requise, le QUARK se place dans le renvoi coud\u00e9, avec un oculaire derri\u00e8re. Laissez le filtre atteindre sa temp\u00e9rature de fonctionnement avant l\u2019observation.<\/p>\n<\/header>\n

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QUARK performs at its best on refractors between f\/4 and f\/8. It works outside this range, but with some compromises on brightness or bandwidth finesse (details below).<\/p>\n

Please specify the version when placing your order or contact me \ud83d\ude42\u00a0<\/strong><\/em><\/span><\/p>\n<\/section>\n

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Votre lunette actuelle, un nouvel usage en journ\u00e9e<\/h2>\n

Le Quark permet d\u2019aborder le solaire H-alpha en conservant une lunette compatible : achromatique, ED, apochromatique ou Petzval. Un m\u00eame filtre peut accompagner l\u2019\u00e9volution de votre \u00e9quipement, \u00e0 condition de revalider le montage et la protection \u00e0 chaque changement d\u2019instrument.<\/p>\n

Ce mod\u00e8le avec t\u00e9l\u00e9centrique int\u00e9gr\u00e9e vise en priorit\u00e9 les r\u00e9fracteurs F\/4 \u00e0 F\/8. Consultez le s\u00e9lecteur de compatibilit\u00e9 officiel DayStar<\/a> pour choisir la bonne version. Les SCT et Maksutov demandent une configuration sp\u00e9cifique, g\u00e9n\u00e9ralement autour du Combo Quark<\/a>. Pour les objectifs Canon ou Nikon, le fabricant propose une version Camera Quark et des adaptations d\u00e9di\u00e9es : la compatibilit\u00e9 n\u2019est pas automatique avec ce mod\u00e8le.<\/p>\n

Filtration de protection :<\/strong> le besoin d\u2019un filtre UV\/IR-cut ou d\u2019un ERF frontal d\u00e9pend notamment du diam\u00e8tre et de la conception de l\u2019instrument. Faites valider l\u2019ensemble avant tout pointage solaire et suivez la notice DayStar.<\/p>\n

Passer du visuel \u00e0 l\u2019imagerie<\/h3>\n

Visit accessoires solaires DayStar<\/a> permettent d\u2019adapter la liaison \u00e0 l\u2019oculaire ou \u00e0 la cam\u00e9ra : raccords 1,25 ou 2 pouces, montures T ou C et r\u00e9ducteurs selon le mod\u00e8le. La compatibilit\u00e9 des filetages, le tirage et la mise au point doivent \u00eatre v\u00e9rifi\u00e9s pour chaque combinaison. Les accessoires sont propos\u00e9s s\u00e9par\u00e9ment.<\/p>\n

En imagerie, un adaptateur de tilt DayStar peut aider \u00e0 r\u00e9duire les anneaux de Newton. Le r\u00e9sultat d\u00e9pend de la cam\u00e9ra et du r\u00e9glage ; consultez les conseils de montage du fabricant<\/a> pour choisir l\u2019adaptateur appropri\u00e9.<\/p>\n

Un projet pour votre club ou votre \u00e9tablissement ?<\/h3>\n

DayStar d\u00e9veloppe des \u00e9quipements solaires depuis plus de 50 ans. Pour une initiation, une activit\u00e9 p\u00e9dagogique ou un programme d\u2019imagerie, contactez Deep Space Astronomy<\/a> avec le mod\u00e8le de votre instrument, votre cam\u00e9ra \u00e9ventuelle et vos objectifs : nous vous aiderons \u00e0 choisir une configuration adapt\u00e9e et \u00e0 \u00e9tablir un devis.<\/p>\n

Technical specifications<\/h2>\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n
Summary table<\/caption>\n
Type<\/th>\nH-alpha all-in-one eyepiece format filter<\/td>\n<\/tr>\n
Available versions<\/th>\nProminence (wider band, brighter image) or Chromosphere (narrower band, better surface contrast)<\/td>\n<\/tr>\n
<\/th>\n<\/td>\n<\/tr>\n
Integrated optics<\/th>\n4.2\u00d7 telecentric barlow, 2 elements, optimized for 656 nm<\/td>\n<\/tr>\n
Free opening<\/th>\n21 mm<\/td>\n<\/tr>\n
Interface<\/th>\n1.25\u2033 eyepiece output, 1.25\u2033 and 2\u2033 adapters supplied<\/td>\n<\/tr>\n
Power supply<\/th>\nUSB 5 V (1.5 A recommended), 90-240 VAC power adapter and international plugs supplied<\/td>\n<\/tr>\n
Setting<\/th>\nTuning wheel \u00b10.5 \u00c5 with 0.1 \u00c5 steps, status LED<\/td>\n<\/tr>\n
Accessories included<\/th>\nBrass clamping ring, Twist-Case, adapters<\/td>\n<\/tr>\n
Warranty<\/th>\n5 years<\/td>\n<\/tr>\n
Autonomy<\/th>\nLow power consumption, compatible with optional battery pack (up to 8h)<\/td>\n<\/tr>\n
The ideal beach<\/th>\nf\/4 to f\/8 refractors, full-disc up to approx. 450 mm focal length<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<\/section>\n
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Chromosphere or Prominence, how to choose?<\/h2>\n

<\/p>\n

This is the question I'm asked most often. The answer can be summed up in one sentence: both show the surface and the protuberances, but with a different bandwidth, and therefore a different compromise between brightness and contrast.<\/p>\n\n\n\n\n\n\n\n\n\n\n
Criteria<\/th>\nChromosphere<\/th>\nProminence<\/th>\n<\/tr>\n<\/thead>\n
Bandwidth (FWHM)<\/td>\nNarrower, higher spectral selectivity<\/td>\nWider, more light<\/td>\n<\/tr>\n
Filaments and surface details<\/td>\nClearly visible, that's its strong point<\/td>\nLess pronounced, sometimes invisible depending on conditions<\/td>\n<\/tr>\n
Limb protuberances<\/td>\nVisible, sometimes with less contrast than in Prominence<\/td>\nVery bright and spectacular<\/td>\n<\/tr>\n
Chromospheric contrast (patches, spots, granulation)<\/td>\nExcellent, ideal for detailing<\/td>\nWeaker, the emphasis is on brightness<\/td>\n<\/tr>\n
Public type<\/td>\nVersatile observers, astrophotographers of the solar disk<\/td>\nObservers who mainly want spectacular protuberances<\/td>\n<\/tr>\n
Visual sensation<\/td>\nSlightly darker image, rich in fine detail<\/td>\nBrighter image, eye-catching protuberances<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n
In plain English:<\/strong> take the Chromosphere<\/em> if you want to see the filaments and surface detail. Take the Prominence<\/em> if you want shiny protuberances on the limb.<\/div>\n<\/section>\n
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In the field<\/h2>\n
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  • Sur une lunette entre f\/4 et f\/8, c’est la configuration id\u00e9ale. Apr\u00e8s validation du montage et de sa filtration de protection, vous installez le QUARK et l\u2019oculaire 1,25″, puis attendez l\u2019\u00e9tat pr\u00eat indiqu\u00e9 par le filtre.<\/li>\n
  • At f\/4, the image is brighter but the effective bandwidth widens, so you lose a little selectivity.<\/li>\n
  • Above f\/9, the image becomes visually darker. This is often a good choice for long exposure photography, less so for direct observation.<\/li>\n
  • The tuning wheel allows the standard to be precisely centered on the H-alpha line. Notches of 0.1 \u00c5 make the adjustment repeatable from one session to the next.<\/li>\n
  • The optional battery pack is a real plus for field trips far from a mains socket.<\/li>\n<\/ul>\n

    Compatibility with your instrument<\/h3>\n\n\n\n\n\n\n\n\n\n
    Telescope type<\/th>\nWhat it looks like<\/th>\n<\/tr>\n<\/thead>\n
    Refractors f\/4 to f\/8<\/td>\nRecommended configuration for optimum performance<\/td>\n<\/tr>\n
    Refractors beyond f\/9<\/td>\nWorks, but darker visual image. More photo-oriented.<\/td>\n<\/tr>\n
    Refractors below f\/4<\/td>\nWorks, brighter image but wider bandwidth<\/td>\n<\/tr>\n
    Large diameters<\/td>\nUtilisable sur des r\u00e9fracteurs de grand diam\u00e8tre avec un rejet d\u2019\u00e9nergie adapt\u00e9 ; v\u00e9rifier les exigences d\u2019ERF frontal selon la configuration<\/td>\n<\/tr>\n
    Off-axis configurations<\/td>\nThe QUARK is not designed for this purpose.<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<\/section>\n
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    What you get<\/h2>\n
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    • QUARK (Prominence or Chromosphere version, depending on your choice)<\/li>\n
    • 1.25\u2033 and 2\u2033 snouts with safety catches<\/li>\n
    • Brass clamping ring to protect your lens<\/li>\n
    • 90-240 VAC power adapter with international plugs<\/li>\n
    • Twist-Case carrying case<\/li>\n
    • Documentation and 5-year warranty<\/li>\n
    • Optional: 8-hour battery pack<\/li>\n<\/ul>\n<\/section>\n
      \n

      Frequently asked questions<\/h2>\n

      Do both versions show the protuberances?<\/h3>\n

      Yes, without exception. The difference is that Prominence makes them brighter and more spectacular, while Chromosphere reveals the filaments and fine texture of the surface.<\/p>\n

      Can I use QUARK on a frame already fitted with a front filter?<\/h3>\n

      No. The QUARK is a stand-alone H-alpha unit, designed to stand alone in the optical chain. Stacking unsuitable front-end filters is at best inefficient, at worst dangerous. The only exception is ERFs (Energy Rejection Filters), which are designed to operate upstream.<\/p>\n

      Is it safe to observe the Sun directly?<\/h3>\n

      Yes, as long as you follow the manufacturer's instructions. Never point the Sun without equipment specifically designed and certified for this purpose.<\/p>\n<\/section>\n

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      Our recommendation<\/h2>\n
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      Take the Chromosphere<\/em><\/strong> if :<\/p>\n

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      • You want a versatile instrument that shows filaments, patches and chromospheric details.<\/li>\n
      • You're doing or want to do solar astrophotography and are looking for contrast<\/li>\n<\/ul>\n

        Take the Prominence<\/em><\/strong> if :<\/p>\n

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        • Your priority is the luminous protuberances on the limb<\/li>\n
        • You want a brighter, more immediate image for fast visual sessions<\/li>\n<\/ul>\n

          In practice, the majority of our customers choose the Chromosphere<\/em> for its versatility. But if you already know that what makes you tick is the protuberances, the Prominence<\/em> will not disappoint.<\/p>\n<\/div>\n<\/section>\n