{"id":5909,"date":"2020-08-28T08:02:24","date_gmt":"2020-08-28T06:02:24","guid":{"rendered":"http:\/\/www.arnaudom.fr\/wordpress\/?page_id=5909"},"modified":"2020-08-28T08:13:01","modified_gmt":"2020-08-28T06:13:01","slug":"reflexbath","status":"publish","type":"page","link":"https:\/\/www.arnaudom.fr\/wordpress\/reflexbath\/","title":{"rendered":"reflexbath"},"content":{"rendered":"\t\t<div data-elementor-type=\"wp-page\" data-elementor-id=\"5909\" class=\"elementor elementor-5909\">\n\t\t\t\t\t\t<div class=\"elementor-inner\">\n\t\t\t\t<div class=\"elementor-section-wrap\">\n\t\t\t\t\t\t\t\t\t<section class=\"elementor-section elementor-top-section elementor-element elementor-element-7eda4d0 elementor-section-full_width elementor-section-height-default elementor-section-height-default\" data-id=\"7eda4d0\" data-element_type=\"section\">\n\t\t\t\t\t\t<div class=\"elementor-container elementor-column-gap-default\">\n\t\t\t\t\t\t\t<div class=\"elementor-row\">\n\t\t\t\t\t<div class=\"elementor-column elementor-col-100 elementor-top-column elementor-element elementor-element-8ed97a9\" data-id=\"8ed97a9\" data-element_type=\"column\" data-settings=\"{&quot;background_background&quot;:&quot;classic&quot;}\">\n\t\t\t<div class=\"elementor-column-wrap elementor-element-populated\">\n\t\t\t\t\t\t\t<div class=\"elementor-widget-wrap\">\n\t\t\t\t\t\t<div class=\"elementor-element elementor-element-89de372 elementor-widget elementor-widget-heading\" data-id=\"89de372\" data-element_type=\"widget\" data-widget_type=\"heading.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t<h1 class=\"elementor-heading-title elementor-size-default\">Mise au point avec un masque de Bathinov<\/h1>\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-ca0c929 elementor-widget elementor-widget-text-editor\" data-id=\"ca0c929\" data-element_type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t\t<div class=\"elementor-text-editor elementor-clearfix\">\n\t\t\t\t<p><em>Ecrit le 02\/05\/14.<\/em><\/p>\t\t\t\t\t<\/div>\n\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-c423115 elementor-widget elementor-widget-text-editor\" data-id=\"c423115\" data-element_type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t\t<div class=\"elementor-text-editor elementor-clearfix\">\n\t\t\t\t<p style=\"text-align: center;\"><strong><span style=\"color: #3366ff;\">Probl\u00e9matique<\/span> <\/strong><\/p>\t\t\t\t\t<\/div>\n\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-48cac2f elementor-widget elementor-widget-text-editor\" data-id=\"48cac2f\" data-element_type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t\t<div class=\"elementor-text-editor elementor-clearfix\">\n\t\t\t\t<p>La mise au point est une \u00e9tape d\u00e9licate et cruciale en astrophotographie, et ce encore plus quand on poss\u00e8de comme moi un instrument dont le rapport F\/D est petit. En effet, avec mon 200\/800 on obtient un rapport F\/D de 4 et plus le F\/D est petit, plus la plage de tol\u00e9rance concernant la mise au point est restreinte. Jusqu&rsquo;\u00e0 pr\u00e9sent je me suis toujours content\u00e9 de faire la mise au point au jug\u00e9, en utilisant le logiciel APNFocus et en observant les images obtenues sur l&rsquo;\u00e9cran du portable. Mais j&rsquo;ai souhait\u00e9 maintenant trouver une m\u00e9thode plus fiable et aussi plus rapide.<\/p><p>Pour cela, j&rsquo;ai test\u00e9 l&rsquo;utilisation d&rsquo;un masque de Bathinov. Il existe des masques de ce type de diff\u00e9rentes sortes, mais j&rsquo;ai opt\u00e9 pour un masque vendu par <a href=\"http:\/\/www.pierro-astro.com\/\">Pierro-Astro<\/a>, qui est m\u00e9tallique et est vendu avec 4 petites vis qui permettent de le fixer facilement \u00e0 l&rsquo;avant du t\u00e9lescope. On peut trouver des masques adapt\u00e9s \u00e0 tous les diam\u00e8tres existants.<\/p><div class=\"centre\"><img decoding=\"async\" class=\"aligncenter\" src=\"http:\/\/www.arnaudom.fr\/Img\/bath01.jpg\" alt=\"Bathinov\" \/><\/div><p>\u00a0<\/p><div class=\"centre\"><img decoding=\"async\" class=\"aligncenter\" src=\"http:\/\/www.arnaudom.fr\/Img\/bath02.jpg\" alt=\"Bathinov\" \/><\/div><p class=\"ita centre\" style=\"text-align: center;\">(Images tir\u00e9es du site de Pierro-astro)<\/p>\t\t\t\t\t<\/div>\n\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-697eeae elementor-widget elementor-widget-text-editor\" data-id=\"697eeae\" data-element_type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t\t<div class=\"elementor-text-editor elementor-clearfix\">\n\t\t\t\t<p style=\"text-align: center;\"><strong><span style=\"color: #3366ff;\">Utilisation du masque<\/span> <\/strong><\/p>\t\t\t\t\t<\/div>\n\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-9682dbb elementor-widget elementor-widget-text-editor\" data-id=\"9682dbb\" data-element_type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t\t<div class=\"elementor-text-editor elementor-clearfix\">\n\t\t\t\t<p>J&rsquo;ai donc fait le test lors de ma s\u00e9ance d&rsquo;acquisition sur la galaxie M63. J&rsquo;ai point\u00e9 une \u00e9toile brillante, lanc\u00e9 une s\u00e9rie d&rsquo;acquisitions courtes (poses de 10 secondes) et utilis\u00e9 APNFocus pour visualiser les r\u00e9sultats. Voici une premi\u00e8re mise au point tr\u00e8s grossi\u00e8re en d\u00e9but de test :<\/p><div class=\"centre\"><img decoding=\"async\" class=\"aligncenter\" src=\"http:\/\/www.arnaudom.fr\/Img\/bath03.jpg\" alt=\"Bathinov\" \/><\/div><p>Ensuite le masque est plac\u00e9 \u00e0 l&rsquo;avant du tube, on obtient une figure de ce type :<\/p><div class=\"centre\"><img decoding=\"async\" class=\"aligncenter\" src=\"http:\/\/www.arnaudom.fr\/Img\/bath04.jpg\" alt=\"Bathinov\" \/><\/div><p>Il s&rsquo;agit maintenant d&rsquo;affiner la mise au point, en faisant en sorte d&rsquo;am\u00e9liorer la nettet\u00e9 de l&rsquo;image. Plus la mise au point s&rsquo;am\u00e9liore, plus la figure obtenue devient fine et sym\u00e9trique :<\/p><div class=\"centre\"><img decoding=\"async\" class=\"aligncenter\" src=\"http:\/\/www.arnaudom.fr\/Img\/bath05.jpg\" alt=\"Bathinov\" \/><\/div><p>On se rapproche assez vite de la figure id\u00e9ale. Quand la mise au point est faite, on obtient alors une image parfaitement sym\u00e9trique :<\/p><div class=\"centre\"><img decoding=\"async\" class=\"aligncenter\" src=\"http:\/\/www.arnaudom.fr\/Img\/bath06.jpg\" alt=\"Bathinov\" \/><\/div><p>En enlevant le masque, on obtient la confirmation de la justesse de notre mise au point :<\/p><div class=\"centre\"><img decoding=\"async\" class=\"aligncenter\" src=\"http:\/\/www.arnaudom.fr\/Img\/bath07.jpg\" alt=\"Bathinov\" \/><\/div><p>En conclusion, je dirais que l&rsquo;utilisation du masque permet de gagner beaucoup en rapidit\u00e9 et en efficacit\u00e9.<\/p><p>Je pense que je pourrais difficilement m&rsquo;en passer d\u00e9sormais !<\/p>\t\t\t\t\t<\/div>\n\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/div>\n\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/section>\n\t\t\t\t\t\t\t\t\t<\/div>\n\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t","protected":false},"excerpt":{"rendered":"<p>Mise au point avec un masque de Bathinov Ecrit le 02\/05\/14. Probl\u00e9matique La mise au point est une \u00e9tape d\u00e9licate et cruciale en astrophotographie, et ce encore plus quand on poss\u00e8de comme moi un instrument dont le rapport F\/D est petit. En effet, avec mon 200\/800 on obtient un rapport F\/D de 4 et plus &hellip;<\/p>\n<p class=\"read-more\"> <a class=\"\" href=\"https:\/\/www.arnaudom.fr\/wordpress\/reflexbath\/\"> <span class=\"screen-reader-text\">reflexbath<\/span> Lire la suite\u00a0\u00bb<\/a><\/p>\n","protected":false},"author":1,"featured_media":0,"parent":0,"menu_order":0,"comment_status":"closed","ping_status":"closed","template":"","meta":{"site-sidebar-layout":"default","site-content-layout":"default","ast-site-content-layout":"","site-content-style":"default","site-sidebar-style":"default","ast-global-header-display":"","ast-banner-title-visibility":"","ast-main-header-display":"","ast-hfb-above-header-display":"","ast-hfb-below-header-display":"","ast-hfb-mobile-header-display":"","site-post-title":"disabled","ast-breadcrumbs-content":"","ast-featured-img":"","footer-sml-layout":"","theme-transparent-header-meta":"default","adv-header-id-meta":"","stick-header-meta":"","header-above-stick-meta":"","header-main-stick-meta":"","header-below-stick-meta":"","astra-migrate-meta-layouts":"","ast-page-background-enabled":"default","ast-page-background-meta":{"desktop":{"background-color":"","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-gradient":""},"tablet":{"background-color":"","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-gradient":""},"mobile":{"background-color":"","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-gradient":""}},"ast-content-background-meta":{"desktop":{"background-color":"var(--ast-global-color-5)","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-gradient":""},"tablet":{"background-color":"var(--ast-global-color-5)","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-gradient":""},"mobile":{"background-color":"var(--ast-global-color-5)","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-gradient":""}},"footnotes":""},"class_list":["post-5909","page","type-page","status-publish","hentry"],"_links":{"self":[{"href":"https:\/\/www.arnaudom.fr\/wordpress\/wp-json\/wp\/v2\/pages\/5909","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.arnaudom.fr\/wordpress\/wp-json\/wp\/v2\/pages"}],"about":[{"href":"https:\/\/www.arnaudom.fr\/wordpress\/wp-json\/wp\/v2\/types\/page"}],"author":[{"embeddable":true,"href":"https:\/\/www.arnaudom.fr\/wordpress\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/www.arnaudom.fr\/wordpress\/wp-json\/wp\/v2\/comments?post=5909"}],"version-history":[{"count":5,"href":"https:\/\/www.arnaudom.fr\/wordpress\/wp-json\/wp\/v2\/pages\/5909\/revisions"}],"predecessor-version":[{"id":5922,"href":"https:\/\/www.arnaudom.fr\/wordpress\/wp-json\/wp\/v2\/pages\/5909\/revisions\/5922"}],"wp:attachment":[{"href":"https:\/\/www.arnaudom.fr\/wordpress\/wp-json\/wp\/v2\/media?parent=5909"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}