{"id":5594,"date":"2020-08-18T23:41:22","date_gmt":"2020-08-18T21:41:22","guid":{"rendered":"http:\/\/www.arnaudom.fr\/wordpress\/?page_id=5594"},"modified":"2021-02-18T08:31:46","modified_gmt":"2021-02-18T07:31:46","slug":"reflexpro","status":"publish","type":"page","link":"https:\/\/www.arnaudom.fr\/wordpress\/reflexpro\/","title":{"rendered":"reflexpro"},"content":{"rendered":"\t\t<div data-elementor-type=\"wp-page\" data-elementor-id=\"5594\" class=\"elementor elementor-5594\">\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-5c24fec elementor-section-full_width elementor-section-height-default elementor-section-height-default\" data-id=\"5c24fec\" 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-7fd0c94\" data-id=\"7fd0c94\" 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-bf5b70e elementor-widget elementor-widget-heading\" data-id=\"bf5b70e\" 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\">Images avec un reflex num\u00e9rique<\/h1>\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-1d23e23 elementor-widget elementor-widget-image\" data-id=\"1d23e23\" data-element_type=\"widget\" data-widget_type=\"image.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t\t<div class=\"elementor-image\">\n\t\t\t\t\t\t\t\t\t\t\t\t<img loading=\"lazy\" decoding=\"async\" width=\"300\" height=\"204\" src=\"https:\/\/www.arnaudom.fr\/wordpress\/wp-content\/uploads\/2018\/08\/Canon350D.jpg\" class=\"attachment-large size-large wp-image-1057\" alt=\"\" \/>\t\t\t\t\t\t\t\t\t\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-d18905a elementor-widget elementor-widget-heading\" data-id=\"d18905a\" data-element_type=\"widget\" data-widget_type=\"heading.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t<h2 class=\"elementor-heading-title elementor-size-default\">Probl\u00e8mes rencontr\u00e9s<\/h2>\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-1a19fa2 elementor-widget elementor-widget-text-editor\" data-id=\"1a19fa2\" 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>Les trois principaux probl\u00e8mes rencontr\u00e9s lors des premi\u00e8res sc\u00e9ances de prises de vue sont les suivants :<\/p><ul><li><strong>probl\u00e8me de mise au point :<\/strong><br \/>c&rsquo;est l&rsquo;un des probl\u00e8mes principal qu&rsquo;il faut r\u00e9soudre ! Quand on fait une photo du ciel profond, on ne voit pratiquement rien dans le petit verre de vis\u00e9e du Canon ! Il est donc impossible de faire la mise au point ainsi.<br \/>Il faut en fait commencer par faire des s\u00e9ries de clich\u00e9s, puis observer l&rsquo;image obtenue pour estimer la qualit\u00e9 de la mise au point. Pas facile ! Il existe diff\u00e9rentes m\u00e9thodes pour y arriver. Dans mon cas, comme j&rsquo;utilise l&rsquo;ordinateur portable pour faire les prises de vue, j&rsquo;ai r\u00e9gl\u00e9 ce probl\u00e8me en utilisant le logiciel APN Focus, qui constitue une aide formidable pour la mise au point ! Voir la <a href=\"http:\/\/www.arnaudom.fr\/wordpress\/reflexfocus\/\">rubrique correspondante<\/a>.<br \/><br \/><\/li><li><strong>probl\u00e8me du stockage des images :<\/strong><br \/>les images du ciel profond doivent \u00eatre prises en format RAW, format qui permet de conserver toutes les informations contenues dans l&rsquo;image et de la traiter efficacement ensuite, contrairement au format courant JPEG qui compresse la photo et lui fait perdre beaucoup d&rsquo;informations. Le probl\u00e8me est que les images RAW \u00ab\u00a0p\u00e8sent\u00a0\u00bb beaucoup plus lourd que les JPEG, il faut donc pr\u00e9voir une carte m\u00e9moire avec une capacit\u00e9 suffisante qui permet de stocker plusieurs dizaines (voire centaine) de photos. L\u00e0 aussi, le fait d&rsquo;utiliser un ordinateur portable me permet de r\u00e9gler ce probl\u00e8me car les photos vont se stocker directement sur son disque dur plut\u00f4t que sur la carte m\u00e9moire du Canon.<br \/><br \/><\/li><li><strong>probl\u00e8me d&rsquo;alimentation de l&rsquo;appareil-photo et de l&rsquo;ordinateur portable :<\/strong><br \/>un autre probl\u00e8me est l&rsquo;autonomie du Canon (et \u00e9galement de l&rsquo;ordinateur dans mon cas). Bien entendu, on peut commencer par veiller \u00e0 ce que les batteries de nos appareils soient charg\u00e9s au maximum avant de commencer. Cependant je me suis aper\u00e7u que lors de mes premi\u00e8res sc\u00e9ances de prise de vue (d&rsquo;une dur\u00e9e de 1h30 \u00e0 2 heures environ), la batterie du Canon ne tient pas le coup. La solution est simple : il vaut mieux se procurer une ou deux batteries suppl\u00e9mentaires pour \u00eatre tranquille (dans mon cas j&rsquo;en ai trois).<br \/>Concernant l&rsquo;ordinateur portable, j&rsquo;ai r\u00e9gl\u00e9 le probl\u00e8me en l&rsquo;alimentant par une batterie de voiture. N&rsquo;\u00e9tant pas tr\u00e8s comp\u00e9tent dans le domaine des batteries, de l&rsquo;\u00e9lectronique ou de la soudure, je n&rsquo;ai rien bricol\u00e9 moi-m\u00eame mais j&rsquo;utilise un montage tr\u00e8s simple \u00e0 partir d&rsquo;\u00e9l\u00e9ments achet\u00e9s dans le commerce. Vous trouverez le d\u00e9tail de mon petit syst\u00e8me \u00e0 la <a href=\"http:\/\/www.arnaudom.fr\/wordpress\/autoalim\/\">rubrique correspondante<\/a>.<\/li><\/ul>\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>Images avec un reflex num\u00e9rique Probl\u00e8mes rencontr\u00e9s Les trois principaux probl\u00e8mes rencontr\u00e9s lors des premi\u00e8res sc\u00e9ances de prises de vue sont les suivants : probl\u00e8me de mise au point :c&rsquo;est l&rsquo;un des probl\u00e8mes principal qu&rsquo;il faut r\u00e9soudre ! Quand on fait une photo du ciel profond, on ne voit pratiquement rien dans le petit verre &hellip;<\/p>\n<p class=\"read-more\"> <a class=\"\" href=\"https:\/\/www.arnaudom.fr\/wordpress\/reflexpro\/\"> <span class=\"screen-reader-text\">reflexpro<\/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-5594","page","type-page","status-publish","hentry"],"_links":{"self":[{"href":"https:\/\/www.arnaudom.fr\/wordpress\/wp-json\/wp\/v2\/pages\/5594","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=5594"}],"version-history":[{"count":8,"href":"https:\/\/www.arnaudom.fr\/wordpress\/wp-json\/wp\/v2\/pages\/5594\/revisions"}],"predecessor-version":[{"id":6975,"href":"https:\/\/www.arnaudom.fr\/wordpress\/wp-json\/wp\/v2\/pages\/5594\/revisions\/6975"}],"wp:attachment":[{"href":"https:\/\/www.arnaudom.fr\/wordpress\/wp-json\/wp\/v2\/media?parent=5594"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}