{"id":17224,"date":"2023-01-11T15:25:16","date_gmt":"2023-01-11T15:25:16","guid":{"rendered":"https:\/\/blogs.futura-sciences.com\/feldmann\/?p=17224"},"modified":"2024-11-03T10:04:07","modified_gmt":"2024-11-03T10:04:07","slug":"peut-on-choisir-son-premier-telescope-sans-se-tromper","status":"publish","type":"post","link":"https:\/\/blogs.futura-sciences.com\/feldmann\/2023\/01\/11\/peut-on-choisir-son-premier-telescope-sans-se-tromper\/","title":{"rendered":"Bien choisir son premier t\u00e9lescope"},"content":{"rendered":"<p><strong>Le choix d&#8217;un premier t\u00e9lescope est toujours d\u00e9licat : comment ne pas se tromper ? Je me propose de vous guider dans votre recherche.<\/strong><\/p>\n<h5>Le grand saut :<\/h5>\n<p>C&#8217;est d\u00e9cid\u00e9, vous allez acqu\u00e9rir votre premier t\u00e9lescope ! Vous connaissez les <a href=\"https:\/\/www.futura-sciences.com\/sciences\/definitions\/univers-constellation-21\/\" target=\"_blank\" rel=\"noopener\">constellations<\/a> que vous rep\u00e9rez sans souci. Explorer le ciel nocturne avec une <a href=\"https:\/\/blogs.futura-sciences.com\/feldmann\/2017\/10\/30\/ciel-aux-jumelles-guide-decouvrir-ciel-nocturne\/\" target=\"_blank\" rel=\"noopener\">paire de jumelles<\/a> ne vous fait pas peur. Vous avez peut-\u00eatre m\u00eame d\u00e9j\u00e0 point\u00e9 la <a href=\"https:\/\/blogs.futura-sciences.com\/feldmann\/2023\/01\/07\/la-pleine-lune-de-janvier-et-la-chapelle-beaujolaise\/\" target=\"_blank\" rel=\"noopener\">Lune<\/a> et les plan\u00e8tes avec une <a href=\"https:\/\/blogs.futura-sciences.com\/feldmann\/2017\/12\/10\/longue-vue-bon-choix-debuter-astronomie\/\" target=\"_blank\" rel=\"noopener\">longue-vue<\/a>. La passion s&#8217;est install\u00e9e progressivement, et maintenant vous avez envie de franchir le pas. D\u00e9sormais, c&#8217;est vers les t\u00e9lescopes que vous lorgnez. Mais voil\u00e0 : comment s&#8217;y retrouver devant la multitude des instruments propos\u00e9s ? Comment \u00eatre s\u00fbr que ce premier t\u00e9lescope sera facile \u00e0 utiliser ?<\/p>\n<figure id=\"attachment_17232\" aria-describedby=\"caption-attachment-17232\" style=\"width: 450px\" class=\"wp-caption alignnone\"><a href=\"https:\/\/blogs.futura-sciences.com\/feldmann\/wp-content\/uploads\/sites\/9\/2023\/01\/telescope.jpg\" rel=\"lightbox[17224]\"><img loading=\"lazy\" decoding=\"async\" class=\"size-medium wp-image-17232\" src=\"https:\/\/blogs.futura-sciences.com\/feldmann\/wp-content\/uploads\/sites\/9\/2023\/01\/telescope-450x270.jpg\" alt=\"\" width=\"450\" height=\"270\" srcset=\"https:\/\/blogs.futura-sciences.com\/feldmann\/wp-content\/uploads\/sites\/9\/2023\/01\/telescope-450x270.jpg 450w, https:\/\/blogs.futura-sciences.com\/feldmann\/wp-content\/uploads\/sites\/9\/2023\/01\/telescope-1024x614.jpg 1024w, https:\/\/blogs.futura-sciences.com\/feldmann\/wp-content\/uploads\/sites\/9\/2023\/01\/telescope-768x461.jpg 768w, https:\/\/blogs.futura-sciences.com\/feldmann\/wp-content\/uploads\/sites\/9\/2023\/01\/telescope.jpg 1500w\" sizes=\"auto, (max-width: 450px) 100vw, 450px\" \/><\/a><figcaption id=\"caption-attachment-17232\" class=\"wp-caption-text\">Un bon t\u00e9lescope est un t\u00e9lescope que l&#8217;on sort souvent ! \u00a9 Jean-Baptiste Feldmann<\/figcaption><\/figure>\n<p>On ne compte plus les instruments d&#8217;astronomie qui ont d\u00e9courag\u00e9 leurs acqu\u00e9reurs, trop complexes \u00e0 monter et \u00e0 r\u00e9gler. Je vais donc vous donner quelques pistes pour vous guider dans votre choix.<!--more--><\/p>\n<h5>Les points importants :<\/h5>\n<p>\u00c0 juste raison, on dit souvent qu&#8217;un bon t\u00e9lescope est un t\u00e9lescope que l&#8217;on sort souvent. Pour ne pas \u00eatre d\u00e9\u00e7u par votre premier instrument astronomique, voici donc quelques \u00e9l\u00e9ments qu&#8217;il me semble n\u00e9cessaire de prendre en compte :<\/p>\n<ul>\n<li>le diam\u00e8tre : optez pour un miroir compris entre 130 et 150 millim\u00e8tres de diam\u00e8tre. C&#8217;est bien suffisant pour faire de tr\u00e8s nombreuses observations, pour un co\u00fbt et un encombrement raisonnables<\/li>\n<li>le principe optique : il existe diff\u00e9rents types de t\u00e9lescopes. Apr\u00e8s plusieurs d\u00e9cennies de pratique, je recommande fortement les t\u00e9lescopes de type Schmidt-Cassegrain ou Maksutov-Cassegrain. Il s&#8217;agit d&#8217;une combinaison optique qui permet d&#8217;avoir un tube tr\u00e8s compact. La diff\u00e9rence entre les deux mod\u00e8les concerne la lame correctrice situ\u00e9e \u00e0 l&#8217;avant, mais le principe reste le m\u00eame. L&#8217;optique est r\u00e9gl\u00e9e une fois pour toutes, vous n&#8217;avez pas \u00e0 y toucher\u00a0 :<\/li>\n<\/ul>\n<figure id=\"attachment_17226\" aria-describedby=\"caption-attachment-17226\" style=\"width: 450px\" class=\"wp-caption alignnone\"><a href=\"https:\/\/blogs.futura-sciences.com\/feldmann\/wp-content\/uploads\/sites\/9\/2023\/01\/coupe_telescope.jpg\" rel=\"lightbox[17224]\"><img loading=\"lazy\" decoding=\"async\" class=\"size-medium wp-image-17226\" src=\"https:\/\/blogs.futura-sciences.com\/feldmann\/wp-content\/uploads\/sites\/9\/2023\/01\/coupe_telescope-450x252.jpg\" alt=\"\" width=\"450\" height=\"252\" srcset=\"https:\/\/blogs.futura-sciences.com\/feldmann\/wp-content\/uploads\/sites\/9\/2023\/01\/coupe_telescope-450x252.jpg 450w, https:\/\/blogs.futura-sciences.com\/feldmann\/wp-content\/uploads\/sites\/9\/2023\/01\/coupe_telescope-1024x574.jpg 1024w, https:\/\/blogs.futura-sciences.com\/feldmann\/wp-content\/uploads\/sites\/9\/2023\/01\/coupe_telescope-768x431.jpg 768w, https:\/\/blogs.futura-sciences.com\/feldmann\/wp-content\/uploads\/sites\/9\/2023\/01\/coupe_telescope.jpg 1106w\" sizes=\"auto, (max-width: 450px) 100vw, 450px\" \/><\/a><figcaption id=\"caption-attachment-17226\" class=\"wp-caption-text\">La conception optique des t\u00e9lescopes de type Schmidt-Cassegrain ou Maksutov-Cassegrain en fait des instruments particuli\u00e8rement compacts.\u00a0 \u00a9 <a href=\"https:\/\/www.stelvision.com\/\" target=\"_blank\" rel=\"noopener\">Stelvision<\/a><\/figcaption><\/figure>\n<ul>\n<li>la monture : ce type de t\u00e9lescope est en g\u00e9n\u00e9ral propos\u00e9 sur une monture altazimutale. C&#8217;est une monture l\u00e9g\u00e8re, peu encombrante, \u00e9quip\u00e9e d&#8217;un syst\u00e8me de pointage (appel\u00e9 <em>Go-To<\/em>) et de moteurs. Une raquette de commande vous permet de choisir l&#8217;astre que le t\u00e9lescope va ensuite pointer et suivre automatiquement.<\/li>\n<\/ul>\n<h5>Le budget :<\/h5>\n<p>Vous l&#8217;aurez sans doute compris, c&#8217;est ce genre de t\u00e9lescope qui a ma pr\u00e9f\u00e9rence d\u00e9sormais. Il m&#8217;accompagne dans toutes mes sorties nocturnes ! Et le prix, me direz-vous ? Au moment de la r\u00e9daction de cet article, comptez 700 euros pour un mod\u00e8le de 127 millim\u00e8tres de diam\u00e8tre, 1.100 euros pour le 150 millim\u00e8tres :<\/p>\n<figure id=\"attachment_17227\" aria-describedby=\"caption-attachment-17227\" style=\"width: 372px\" class=\"wp-caption alignnone\"><a href=\"https:\/\/blogs.futura-sciences.com\/feldmann\/wp-content\/uploads\/sites\/9\/2023\/01\/telescope_mak.jpg\" rel=\"lightbox[17224]\"><img loading=\"lazy\" decoding=\"async\" class=\"size-medium wp-image-17227\" src=\"https:\/\/blogs.futura-sciences.com\/feldmann\/wp-content\/uploads\/sites\/9\/2023\/01\/telescope_mak-372x450.jpg\" alt=\"\" width=\"372\" height=\"450\" srcset=\"https:\/\/blogs.futura-sciences.com\/feldmann\/wp-content\/uploads\/sites\/9\/2023\/01\/telescope_mak-372x450.jpg 372w, https:\/\/blogs.futura-sciences.com\/feldmann\/wp-content\/uploads\/sites\/9\/2023\/01\/telescope_mak.jpg 569w\" sizes=\"auto, (max-width: 372px) 100vw, 372px\" \/><\/a><figcaption id=\"caption-attachment-17227\" class=\"wp-caption-text\">Un tube compact, une optique de qualit\u00e9, une monture motoris\u00e9e l\u00e9g\u00e8re et stable, une raquette de commande pour pointer les astres : les t\u00e9lescopes de type Schmidt-Cassegrain ou Maksutov-Cassegrain repr\u00e9sentent le meilleur rapport qualit\u00e9 \/prix pour se lancer s\u00e9rieusement. \u00a9 Celestron<\/figcaption><\/figure>\n<p>C&#8217;est le prix pour un instrument qui vous apportera beaucoup de plaisir. L\u00e9ger et facilement transportable (moins de 8 kilos pour le 150 millim\u00e8tres), performant, autonome si vous y glissez un jeu de piles rechargeables, ce t\u00e9lescope devrait vous combler ! Certes plus cher que d&#8217;autres mod\u00e8les de diam\u00e8tre \u00e9quivalent, le Cassegrain est v\u00e9ritablement le couteau suisse de l&#8217;astronomie. Il s&#8217;utilise aussi bien pour observer la Lune, les plan\u00e8tes, les amas d&#8217;\u00e9toiles, les n\u00e9buleuses ou les galaxies. Luxe supr\u00eame, vous pourrez envisager de le compl\u00e9ter ult\u00e9rieurement par une <a href=\"https:\/\/blogs.futura-sciences.com\/feldmann\/2024\/09\/01\/tete-binoculaire-laccessoire-indispensable\/\" target=\"_blank\" rel=\"noopener\">t\u00eate binoculaire<\/a> :<\/p>\n<p><a href=\"https:\/\/blogs.futura-sciences.com\/feldmann\/wp-content\/uploads\/sites\/9\/2024\/09\/bino1.jpg\" rel=\"lightbox[17224]\"><img loading=\"lazy\" decoding=\"async\" class=\"alignnone size-medium wp-image-20049\" src=\"https:\/\/blogs.futura-sciences.com\/feldmann\/wp-content\/uploads\/sites\/9\/2024\/09\/bino1-450x270.jpg\" alt=\"\" width=\"450\" height=\"270\" srcset=\"https:\/\/blogs.futura-sciences.com\/feldmann\/wp-content\/uploads\/sites\/9\/2024\/09\/bino1-450x270.jpg 450w, https:\/\/blogs.futura-sciences.com\/feldmann\/wp-content\/uploads\/sites\/9\/2024\/09\/bino1-1024x614.jpg 1024w, https:\/\/blogs.futura-sciences.com\/feldmann\/wp-content\/uploads\/sites\/9\/2024\/09\/bino1-768x460.jpg 768w, https:\/\/blogs.futura-sciences.com\/feldmann\/wp-content\/uploads\/sites\/9\/2024\/09\/bino1.jpg 1500w\" sizes=\"auto, (max-width: 450px) 100vw, 450px\" \/><\/a><\/p>\n<p>Si vous avez besoin de conseils suppl\u00e9mentaires avant de faire un achat, n&#8217;h\u00e9sitez pas \u00e0 laisser un commentaire en dessous de cet article ; j&#8217;y r\u00e9pondrai avec plaisir !<\/p>\n<h5>Vous pourriez aimer :<\/h5>\n<ul>\n<li><a href=\"https:\/\/blogs.futura-sciences.com\/feldmann\/2021\/09\/08\/le-ciel-au-telescope-un-guide-pour-reussir-vos-observations\/\" target=\"_blank\" rel=\"noopener\">&#8220;Le ciel au t\u00e9lescope&#8221;, un guide pour r\u00e9ussir vos observations<\/a><\/li>\n<li><a href=\"https:\/\/blogs.futura-sciences.com\/feldmann\/2021\/08\/19\/on-peut-photographier-les-planetes-avec-un-petit-telescope\/\" target=\"_blank\" rel=\"noopener\">Comment photographier les plan\u00e8tes avec un petit t\u00e9lescope<\/a><\/li>\n<li><a href=\"https:\/\/blogs.futura-sciences.com\/feldmann\/2022\/11\/04\/un-grand-telescope-permet-dexplorer-le-ciel-du-morvan\/\" target=\"_blank\" rel=\"noopener\">Un grand t\u00e9lescope permet d&#8217;explorer le ciel du Morvan<\/a><\/li>\n<\/ul>\n<p>Suivez l\u2019actualit\u00e9 astronomique et d\u00e9couvrez mes images du ciel en vous abonnant \u00e0 Cielmania sur\u00a0<a href=\"https:\/\/www.facebook.com\/cielmania\/\" target=\"_blank\" rel=\"noopener noreferrer\">Facebook<\/a>.<\/p>\n<!-- AddThis Advanced Settings generic via filter on the_content --><!-- AddThis Share Buttons generic via filter on the_content -->","protected":false},"excerpt":{"rendered":"<p>Le choix d&#8217;un premier t\u00e9lescope est toujours d\u00e9licat : comment ne pas se tromper ? Je me propose de vous guider dans votre recherche. Le grand saut : C&#8217;est d\u00e9cid\u00e9, vous allez acqu\u00e9rir votre premier t\u00e9lescope ! Vous connaissez les constellations que vous rep\u00e9rez sans souci. Explorer le ciel nocturne avec une paire de jumelles &hellip; <a href=\"https:\/\/blogs.futura-sciences.com\/feldmann\/2023\/01\/11\/peut-on-choisir-son-premier-telescope-sans-se-tromper\/\" class=\"more-link\">Continuer la lecture de <span class=\"screen-reader-text\">Bien choisir son premier t\u00e9lescope<\/span>  <span class=\"meta-nav\">&rarr;<\/span><\/a><!-- AddThis Advanced Settings generic via filter on get_the_excerpt --><!-- AddThis Share Buttons generic via filter on get_the_excerpt --><\/p>\n","protected":false},"author":8,"featured_media":17232,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":"","_links_to":"","_links_to_target":""},"categories":[87],"tags":[2338,3353,451,3352,96],"class_list":["post-17224","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-les-hommes-et-le-ciel","tag-longue-vue","tag-maksutov-cassegrain","tag-paire-de-jumelles","tag-schmidt-cassegrain","tag-telescope"],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v24.1 - https:\/\/yoast.com\/wordpress\/plugins\/seo\/ -->\n<title>Bien choisir son premier t\u00e9lescope<\/title>\n<meta name=\"description\" content=\"Le choix d&#039;un premier t\u00e9lescope est toujours d\u00e9licat : comment ne pas se tromper ? 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