{"id":711,"date":"2019-03-31T17:28:59","date_gmt":"2019-03-31T15:28:59","guid":{"rendered":"http:\/\/masdeminge\/Test-Wordpress\/?page_id=711"},"modified":"2022-01-31T10:51:37","modified_gmt":"2022-01-31T09:51:37","slug":"mise-au-point","status":"publish","type":"page","link":"https:\/\/motsdaubepine.fr\/caussemots\/index.php\/mise-au-point\/","title":{"rendered":"Mise au point"},"content":{"rendered":"<p><span style=\"color: #0000ff; font-size: 18pt;\"><strong>L&rsquo;op\u00e9ration la plus d\u00e9licate car le capteur d&rsquo;un APN n&rsquo;a pas la sensibilit\u00e9 de l\u2019\u0153il qui fait ses corrections de mise au point<\/strong><\/span><\/p>\n<p>Op\u00e9ration difficile sur les objets du ciel profond mais fondamentale pour pouvoir traiter les images<\/p>\n<p>Utiliser une \u00e9toile brillante ,V\u00e9ga par exemple. Faire la mise au point afin de bien visualiser les quatre aigrettes tr\u00e8s fines\u00a0 et faire des temps de pose de 1 \u00e0 10 secondes \u00e0 ISO 800 et v\u00e9rifier les images prises en les agrandissant un maximum avec l&rsquo;\u00e9cran de visualisation du Nikon.<\/p>\n<p>Le mode Live view est pratique pour r\u00e9aliser la mise au point avec un affichage grossissant 10 fois.<\/p>\n<ul>\n<li>Utiliser la vis de blocage du focuseur quand la mise au point est faite<\/li>\n<\/ul>\n<p>Une fois la mise au point effectu\u00e9e elle n&rsquo;a pas besoin d&rsquo;\u00eatre modifi\u00e9e pour faire des photographies de la lune ou des objets du ciel profond<\/p>\n<p>Pointer le t\u00e9lescope sur M2, M13 ou autres amas d&rsquo;\u00e9toiles, v\u00e9rifier la mise au point en mode Live View et en zoomant sur l&rsquo;image et en faisant des prises de vues en mode JPEG Fine.\u00a0 Zoomer sur les photos pour v\u00e9rifier la finesse des \u00e9toiles et des aigrettes.<\/p>\n<p><a href=\"https:\/\/motsdaubepine.fr\/caussemots\/index.php\/amas-dhercule\/\">M13 : D\u00e9tail de prise de vue<\/a><\/p>\n<p><a href=\"https:\/\/motsdaubepine.fr\/caussemots\/index.php\/m2\/\">M2 : D\u00e9tail de prise de vue<\/a><\/p>\n<p><strong>A noter ;<\/strong> Sur une Mak ou un Smith Cassegraiin la mise au point se fait avec le rapport F\/D du miroir primaire qui est de 2 , donc beaucoup moins de plage de tol\u00e9rance que le Newton.<\/p>\n<p><span style=\"color: #0000ff; font-size: 18pt;\"><strong>Exemple de prise de vue pour mise au point avec V\u00e9ga<\/strong><\/span><\/p>\n<p><a href=\"https:\/\/motsdaubepine.fr\/caussemots\/wp-content\/uploads\/2019\/01\/Vega.jpg\"><img loading=\"lazy\" decoding=\"async\" class=\"alignnone wp-image-683 size-full\" src=\"https:\/\/motsdaubepine.fr\/caussemots\/wp-content\/uploads\/2019\/01\/Vega.jpg\" alt=\"\" width=\"1008\" height=\"1000\" srcset=\"https:\/\/motsdaubepine.fr\/caussemots\/wp-content\/uploads\/2019\/01\/Vega.jpg 1008w, https:\/\/motsdaubepine.fr\/caussemots\/wp-content\/uploads\/2019\/01\/Vega-150x150.jpg 150w, https:\/\/motsdaubepine.fr\/caussemots\/wp-content\/uploads\/2019\/01\/Vega-300x298.jpg 300w, https:\/\/motsdaubepine.fr\/caussemots\/wp-content\/uploads\/2019\/01\/Vega-768x762.jpg 768w\" sizes=\"auto, (max-width: 1008px) 100vw, 1008px\" \/><\/a><\/p>\n","protected":false},"excerpt":{"rendered":"<p>L&rsquo;op\u00e9ration la plus d\u00e9licate car le capteur d&rsquo;un APN n&rsquo;a pas la sensibilit\u00e9 de l\u2019\u0153il qui fait ses corrections de mise au point Op\u00e9ration difficile sur les objets du ciel profond mais fondamentale pour pouvoir traiter les images Utiliser une <a class=\"more-link\" href=\"https:\/\/motsdaubepine.fr\/caussemots\/index.php\/mise-au-point\/\">Lire plus &#8230;<\/a><\/p>\n","protected":false},"author":8,"featured_media":0,"parent":0,"menu_order":0,"comment_status":"closed","ping_status":"closed","template":"","meta":{"footnotes":""},"class_list":["post-711","page","type-page","status-publish","hentry"],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v27.6 - 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