{"id":11210,"date":"2026-02-21T11:34:29","date_gmt":"2026-02-21T11:34:29","guid":{"rendered":"https:\/\/astroshop.ma\/?post_type=product&p=11210"},"modified":"2026-02-24T12:07:39","modified_gmt":"2026-02-24T12:07:39","slug":"sky-watcher-tube-optique-72ed-black-diamond-dual-speed","status":"publish","type":"product","link":"https:\/\/astroshop.ma\/?product=sky-watcher-tube-optique-72ed-black-diamond-dual-speed","title":{"rendered":"Sky-Watcher Tube optique 72ED Black Diamond dual speed"},"content":{"rendered":"

\"\"<\/h4>\n

Tout savoir sur la lunette Sky-Watcher EvoStar 72ED<\/h4>\n

Sky-Watcher a r\u00e9cemment compl\u00e9t\u00e9 sa gamme de r\u00e9fracteurs apochromatiques avec l’EvoStar 72ED. C’est le plus petit diam\u00e8tre en r\u00e9fracteur ED de la marque qui s’adresse\u00a0aux amateurs recherchant un instrument le plus transportable et l\u00e9ger possible<\/strong>. L’EvoStar 72ED ne p\u00e8se en effet que 2kg (avec colliers et queue d’aronde) pour une longueur de 420mm, son pare-bu\u00e9e est m\u00eame amovible si besoin (mais non-r\u00e9tractable).\u00a0La haute qualit\u00e9 optique<\/strong>\u00a0de ce mod\u00e8le offre \u00e0 tous la possibilit\u00e9 d’acqu\u00e9rir un instrument performant \u00e0 un prix tr\u00e8s attractif\u00a0pour l’astrophotographie grand champ, l’observation plan\u00e9taire\/solaire ou l’autoguidage<\/strong>. L’EvoStar 72ED ravira plus d’un amateur ou d\u00e9butant gr\u00e2ce \u00e0\u00a0sa bonne correction du chromatisme<\/strong>.<\/p>\n

\"lunette_skywatcher_evostar72ed_02.jpg\"
Lunette Sky-Watcher EvoStar 72ED f\/5.8 Dual Speed<\/figcaption><\/figure>\n

Pour obtenir le pr\u00e9cieux qualificatif “APO”,\u00a0un r\u00e9fracteur doit corriger les aberrations chromatiques primaires et secondaires<\/strong>, inh\u00e9rentes \u00e0 tous les syst\u00e8mes dont les rayons lumineux traversent un \u00e9l\u00e9ment optique. Dans le cas de la Sky-Watcher EvoStar 72ED, un doublet compos\u00e9 d’un \u00e9l\u00e9ment en verre ED r\u00e9duit le chromatisme pour limiter consid\u00e9rablement l’apparition de lis\u00e9r\u00e9s color\u00e9s sur les plan\u00e8tes ou la Lune. Le verre ED choisit,\u00a0du FPL-53 (Schott)<\/strong>, est le plus \u00e0 m\u00eame de corriger ces d\u00e9fauts gr\u00e2ce \u00e0 une tr\u00e8s faible dispersion (NB : ce doublet est diff\u00e9rent des mod\u00e8les Black Diamond).<\/p>\n

\"newton_skywatcher_200f5_03.jpg\"
Syst\u00e8me achro et apo-chromatique<\/figcaption><\/figure>\n

L’utilisation de traitements multi-couches sur toutes les surfaces limite consid\u00e9rablement les pertes dues \u00e0 la travers\u00e9e de l’objectif, ce qui rend\u00a0l’EvoStar 72ED lumineuse et plus contrast\u00e9e que des lunettes classiques moins bien corrig\u00e9es<\/strong>. Le traitement “Metallic High-Transmission” (MHC) est d\u00e9pos\u00e9 sur les surfaces air-verre assurant des r\u00e9sultats \u00e9poustouflants (transmission proche de 99.5%<\/strong>). Gr\u00e2ce \u00e0 son\u00a0rapport de focale tr\u00e8s court, f\/5.8<\/strong>, la lunette Sky-Watcher EvoStar 72ED est particuli\u00e8rement\u00a0int\u00e9ressante pour la photographie du ciel profond<\/strong>. En combinaison, par exemple, avec un appareil photo num\u00e9rique grand format (correcteur\/r\u00e9ducteur conseill\u00e9), pointez la lunette vers de larges n\u00e9buleuses telles Orion, la Lagune ou la fameuse galaxie d’Androm\u00e8de.<\/p>\n

 <\/p>\n

Porte-oculaire Dual Speed 10:1<\/h4>\n

La mise au point s’obtient par l’interm\u00e9diaire d’un\u00a0porte-oculaire Crayford 2″ (en aluminium) offrant robustesse et pr\u00e9cision<\/strong>\u00a0lors de la focalisation. Une vis de serrage permet de maintenir la mise au point suivant l’orientation du tube optique. Pour \u00eatre coh\u00e9rent avec l’optique et fournir de bons r\u00e9sultats en astrophotographie (ou la mise au point a une place primordiale) le porte-oculaire de l’EvoStar 72ED dispose d’une\u00a0vis de d\u00e9multiplication fine \u00e0 10:1<\/strong>.<\/p>\n

Pour r\u00e9pondre aux exigences des astronomes amateurs, le tube optique est enti\u00e8rement r\u00e9alis\u00e9 en aluminium. Aucune pi\u00e8ce plastique n’est utilis\u00e9e! La solidit\u00e9 est donc au rendez-vous comme l’esth\u00e9tique particuli\u00e8rement r\u00e9ussi. L’int\u00e9rieur est noirci et baffl\u00e9 pour limiter l’intrusion de lumi\u00e8res parasites. Une vis au pas Kodak est positionn\u00e9e au-dessus de l’un des colliers pour adapter en parall\u00e8le un appareil photo.<\/p>\n

\"diagram_skywatcher_evostar72ed_01.jpg\"
Sch\u00e9ma de l’EvoStar 72ED et back-focus<\/figcaption><\/figure>\n

Galerie d’astrophotographes<\/h4>\n
\"Le<\/a>
Le Double Amas de Pers\u00e9e<\/strong>\u00a0par\u00a0Vincent Fournaise<\/a>\u00a0(Ventoux, France)
\nPose de 1h30mm avec une lunette Sky-Watcher EvoStar 72ED f\/5,8 et une cam\u00e9ra\u00a0ZWO ASI071MC-Pro<\/a>.
\nMonture \u00e9quatoriale\u00a0Sky-Watcher Star Adventurer<\/a>, cam\u00e9ra de guidage\u00a0ZWO ASI290MM Mini<\/a>\u00a0et filtres\u00a0Astronomik IR-Block 50,8mm<\/a>.
\n(photo utilis\u00e9e avec autorisation de l’auteu<\/p>\n

Lunette Sky-Watcher EvoStar 72ED f\/5.8 Dual Speed<\/h4>\n
    \n
  • 1 tube optique Sky-Watcher EvoStar 72ED<\/li>\n
  • 2 colliers de fixation<\/li>\n
  • 1 queue d’aronde type Vixen<\/li>\n
  • 1 support Piggyback pour appareil photo au pas Kodak sur le haut d’un des colliers de fixation<\/li>\n
  • Valise rigide avec mousse pr\u00e9d\u00e9coup\u00e9e<\/li>\n<\/ul>\n<\/figcaption><\/figure>\n","protected":false},"excerpt":{"rendered":"\n\n\n\n\n\n\n\n\n\n\n\n
    Caract\u00e9ristiques<\/th>\nLunette Sky-Watcher EvoStar 72ED f\/5.8 Dual Speed<\/th>\n<\/tr>\n<\/thead>\n
    Tube optique<\/th>\nAluminium
    \nObjectif \u00e0 2 \u00e9l\u00e9ments trait\u00e9s multi-couches avec verre FPL-53 (Schott)<\/td>\n<\/tr>\n
    Formule optique<\/th>\nLunette apochromatique<\/td>\n<\/tr>\n
    Diam\u00e8tre utile<\/th>\n72mm<\/td>\n<\/tr>\n
    Longueur focale<\/th>\n420mm<\/td>\n<\/tr>\n
    Rapport de focale<\/th>\nf\/5.83<\/td>\n<\/tr>\n
    Porte-Oculaire<\/th>\nCrayford 50.8mm Sky-Watcher Dual Speed (avec d\u00e9multiplication 1:10)<\/td>\n<\/tr>\n
    Poids (avec colliers et queue d’aronde)<\/th>\n2kg<\/td>\n<\/tr>\n
    Dimensions du tube (longueur x largeur)<\/th>\n420mm x 89mm<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n","protected":false},"featured_media":11211,"template":"","meta":{"_editorskit_title_hidden":false,"_editorskit_reading_time":0,"_editorskit_is_block_options_detached":false,"_editorskit_block_options_position":"{}","_coblocks_attr":"","_coblocks_dimensions":"","_coblocks_responsive_height":"","_coblocks_accordion_ie_support":"","_crdt_document":"","_monsterinsights_skip_tracking":false,"_monsterinsights_sitenote_active":false,"_monsterinsights_sitenote_note":"","_monsterinsights_sitenote_category":0},"product_brand":[209],"product_cat":[215,211,212,22],"product_tag":[],"class_list":{"0":"post-11210","1":"product","2":"type-product","3":"status-publish","4":"has-post-thumbnail","6":"product_brand-skywatcher","7":"product_cat-astrographs","8":"product_cat-lunette","9":"product_cat-lunette-telescopes","10":"product_cat-telescopes","12":"first","13":"instock","14":"shipping-taxable","15":"purchasable","16":"product-type-simple"},"yoast_head":"\nSky-Watcher Tube optique 72ED Black Diamond dual speed - 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