{"id":8366,"date":"2024-11-23T21:59:12","date_gmt":"2024-11-23T21:59:12","guid":{"rendered":"https:\/\/pierretlambert.com\/?p=8366"},"modified":"2024-11-23T21:59:15","modified_gmt":"2024-11-23T21:59:15","slug":"bases-photographie-ouverture-vitesse-iso","status":"publish","type":"post","link":"https:\/\/pierretlambert.com\/fr\/bases-photographie-ouverture-vitesse-iso\/","title":{"rendered":"Les bases de la photographie : ma\u00eetrisez ouverture, vitesse et ISO simplement"},"content":{"rendered":"\t\t<div data-elementor-type=\"widget\" data-elementor-id=\"8169\" class=\"elementor elementor-8169\" data-elementor-post-type=\"elementor_library\">\n\t\t\t\t\t\t<div class=\"elementor-element elementor-element-13d74196 elementor-toc--minimized-on-tablet elementor-widget elementor-widget-table-of-contents\" data-id=\"13d74196\" data-element_type=\"widget\" data-e-type=\"widget\" data-settings=\"{&quot;headings_by_tags&quot;:[&quot;h2&quot;],&quot;exclude_headings_by_selector&quot;:[],&quot;marker_view&quot;:&quot;numbers&quot;,&quot;no_headings_message&quot;:&quot;Aucun titre n\\u2019a \\u00e9t\\u00e9 trouv\\u00e9 sur cette page.&quot;,&quot;minimize_box&quot;:&quot;yes&quot;,&quot;minimized_on&quot;:&quot;tablet&quot;,&quot;hierarchical_view&quot;:&quot;yes&quot;,&quot;min_height&quot;:{&quot;unit&quot;:&quot;px&quot;,&quot;size&quot;:&quot;&quot;,&quot;sizes&quot;:[]},&quot;min_height_tablet&quot;:{&quot;unit&quot;:&quot;px&quot;,&quot;size&quot;:&quot;&quot;,&quot;sizes&quot;:[]},&quot;min_height_mobile&quot;:{&quot;unit&quot;:&quot;px&quot;,&quot;size&quot;:&quot;&quot;,&quot;sizes&quot;:[]}}\" data-widget_type=\"table-of-contents.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t\t\t<div class=\"elementor-toc__header\">\n\t\t\t\t\t\t<h4 class=\"elementor-toc__header-title\">\n\t\t\t\tTable des mati\u00e8res\t\t\t<\/h4>\n\t\t\t\t\t\t\t\t\t\t<div class=\"elementor-toc__toggle-button elementor-toc__toggle-button--expand\" role=\"button\" tabindex=\"0\" aria-controls=\"elementor-toc__13d74196\" aria-expanded=\"true\" aria-label=\"Ouvrir la table des mati\u00e8res\"><i aria-hidden=\"true\" class=\"fas fa-chevron-down\"><\/i><\/div>\n\t\t\t\t<div class=\"elementor-toc__toggle-button elementor-toc__toggle-button--collapse\" role=\"button\" tabindex=\"0\" aria-controls=\"elementor-toc__13d74196\" aria-expanded=\"true\" aria-label=\"Fermer la table des mati\u00e8res\"><i aria-hidden=\"true\" class=\"fas fa-chevron-up\"><\/i><\/div>\n\t\t\t\t\t<\/div>\n\t\t\t\t<div id=\"elementor-toc__13d74196\" class=\"elementor-toc__body\">\n\t\t\t<div class=\"elementor-toc__spinner-container\">\n\t\t\t\t<i class=\"elementor-toc__spinner eicon-animation-spin eicon-loading\" aria-hidden=\"true\"><\/i>\t\t\t<\/div>\n\t\t<\/div>\n\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\n\n\n\n<p>La photographie, c&rsquo;est l&rsquo;art de capturer et de modeler la lumi\u00e8re pour cr\u00e9er des images uniques. Chaque clich\u00e9 repose sur un \u00e9l\u00e9ment cl\u00e9 : la quantit\u00e9 de lumi\u00e8re qui atteint le capteur de l\u2019appareil photo. Pour contr\u00f4ler cette lumi\u00e8re, trois r\u00e9glages fondamentaux entrent en jeu : <strong>l\u2019ouverture du diaphragme, la vitesse d\u2019obturation, et la sensibilit\u00e9 ISO<\/strong>. Ensemble, ils forment ce qu\u2019on appelle le <strong>triangle d\u2019exposition<\/strong>, un concept essentiel pour tout photographe.<\/p>\n\n\n\n<p>Dans cet article, vous allez d\u00e9couvrir comment ma\u00eetriser ces trois param\u00e8tres pour obtenir des photos parfaitement expos\u00e9es. Que vous cherchiez \u00e0 jouer avec la profondeur de champ, \u00e0 figer un mouvement ou \u00e0 ajuster la luminosit\u00e9 dans des conditions difficiles, je vous guiderai \u00e9tape par \u00e9tape avec mes astuces et r\u00e9glages pr\u00e9f\u00e9r\u00e9s pour r\u00e9ussir vos clich\u00e9s.<\/p>\n\n\n\n<p>Pour comprendre tous les concepts en d\u00e9tail, regardez cette vid\u00e9o o\u00f9 j&rsquo;explique tout sur les bases de la photographie en moins de 10 minutes:<\/p>\n\n\n\n<figure class=\"wp-block-embed is-type-video is-provider-youtube wp-block-embed-youtube wp-embed-aspect-16-9 wp-has-aspect-ratio\"><div class=\"wp-block-embed__wrapper\">\n<span class=\"embed-youtube\" style=\"text-align:center; display: block;\"><iframe class=\"youtube-player\" width=\"800\" height=\"450\" src=\"https:\/\/www.youtube.com\/embed\/yOVOSVoyhvg?version=3&#038;rel=1&#038;showsearch=0&#038;showinfo=1&#038;iv_load_policy=1&#038;fs=1&#038;hl=fr-FR&#038;autohide=2&#038;wmode=transparent\" allowfullscreen=\"true\" style=\"border:0;\" sandbox=\"allow-scripts allow-same-origin allow-popups allow-presentation allow-popups-to-escape-sandbox\"><\/iframe><\/span>\n<\/div><\/figure>\n\n\n\n<h2 class=\"wp-block-heading\"><strong>R\u00e9gler sa profondeur de champ : l\u2019ouverture du diaphragme<\/strong><\/h2>\n\n\n\n<p>\u00c0 l&rsquo;int\u00e9rieur de l\u2019objectif se cache un m\u00e9canisme ing\u00e9nieux, semblable \u00e0 l&rsquo;iris de votre \u0153il, le diaphragme. Constitu\u00e9 de lamelles,&nbsp; il s&rsquo;ouvre et se ferme pour r\u00e9guler la quantit\u00e9 de lumi\u00e8re qui atteint le capteur. Cette ouverture est exprim\u00e9e par une valeur \u00ab\u00a0f\/\u00a0\u00bb, qui varie g\u00e9n\u00e9ralement de f\/1.4 \u00e0 f\/22.<\/p>\n\n\n\n<figure class=\"wp-block-image size-large\"><img data-recalc-dims=\"1\" fetchpriority=\"high\" decoding=\"async\" width=\"800\" height=\"450\" src=\"https:\/\/i0.wp.com\/pierretlambert.com\/wp-content\/uploads\/2024\/11\/objectif-grand-ouvert-diaphragme.jpg?resize=800%2C450&#038;ssl=1\" alt=\"diaphragme objectif grand ouvert f\/1.2\" class=\"wp-image-8370\" srcset=\"https:\/\/i0.wp.com\/pierretlambert.com\/wp-content\/uploads\/2024\/11\/objectif-grand-ouvert-diaphragme.jpg?resize=1024%2C576&ssl=1 1024w, https:\/\/i0.wp.com\/pierretlambert.com\/wp-content\/uploads\/2024\/11\/objectif-grand-ouvert-diaphragme.jpg?resize=300%2C169&ssl=1 300w, https:\/\/i0.wp.com\/pierretlambert.com\/wp-content\/uploads\/2024\/11\/objectif-grand-ouvert-diaphragme.jpg?resize=768%2C432&ssl=1 768w, https:\/\/i0.wp.com\/pierretlambert.com\/wp-content\/uploads\/2024\/11\/objectif-grand-ouvert-diaphragme.jpg?resize=1536%2C864&ssl=1 1536w, https:\/\/i0.wp.com\/pierretlambert.com\/wp-content\/uploads\/2024\/11\/objectif-grand-ouvert-diaphragme.jpg?w=1600&ssl=1 1600w\" sizes=\"(max-width: 800px) 100vw, 800px\" \/><\/figure>\n\n\n\n<p>Le plus petit chiffre f\/1.2 (au dessus) d\u00e9signe la plus grande ouverture et f\/16 la plus petite (en dessous).<\/p>\n\n\n\n<figure class=\"wp-block-image size-large\"><img data-recalc-dims=\"1\" decoding=\"async\" width=\"800\" height=\"450\" src=\"https:\/\/i0.wp.com\/pierretlambert.com\/wp-content\/uploads\/2024\/11\/objectif-ferme-diaphragme.jpg?resize=800%2C450&#038;ssl=1\" alt=\"diaphragme objectif ferm\u00e9 f\/16\" class=\"wp-image-8372\" srcset=\"https:\/\/i0.wp.com\/pierretlambert.com\/wp-content\/uploads\/2024\/11\/objectif-ferme-diaphragme.jpg?resize=1024%2C576&ssl=1 1024w, https:\/\/i0.wp.com\/pierretlambert.com\/wp-content\/uploads\/2024\/11\/objectif-ferme-diaphragme.jpg?resize=300%2C169&ssl=1 300w, https:\/\/i0.wp.com\/pierretlambert.com\/wp-content\/uploads\/2024\/11\/objectif-ferme-diaphragme.jpg?resize=768%2C432&ssl=1 768w, https:\/\/i0.wp.com\/pierretlambert.com\/wp-content\/uploads\/2024\/11\/objectif-ferme-diaphragme.jpg?resize=1536%2C864&ssl=1 1536w, https:\/\/i0.wp.com\/pierretlambert.com\/wp-content\/uploads\/2024\/11\/objectif-ferme-diaphragme.jpg?w=1600&ssl=1 1600w\" sizes=\"(max-width: 800px) 100vw, 800px\" \/><\/figure>\n\n\n\n<p>En fonction de l\u2019ouverture du diaphragme, f\/1.2, f\/8 ou f\/16 le capteur re\u00e7oit une quantit\u00e9 de lumi\u00e8re diff\u00e9rente. Plus le diaphragme est ferm\u00e9, moins il laisse entrer de lumi\u00e8re. Plus il est ouvert, plus le capteur re\u00e7oit de la lumi\u00e8re, la photographie sera donc plus lumineuse.<\/p>\n\n\n\n<p>Lorsque tous les autres param\u00e8tres sont identiques, il faut donc retenir qu\u2019\u00e0 f\/22 l\u2019image sera beaucoup plus sombre qu\u2019\u00e0 f\/1.4.<\/p>\n\n\n\n<p>Il pourrait \u00eatre tentant de penser qu\u2019il suffit alors d\u2019utiliser le chiffre le plus petit possible, une grande ouverture, pour que la photographie soit lumineuse et r\u00e9ussie.<\/p>\n\n\n\n<p>En r\u00e9alit\u00e9, <strong>l\u2019ouverture du diaphragme<\/strong> n\u2019influence pas uniquement la quantit\u00e9 de lumi\u00e8re re\u00e7ue, elle joue un r\u00f4le bien plus crucial : <strong>elle r\u00e9git la profondeur de champ<\/strong>.<\/p>\n\n\n\n<p>La profondeur de champ d\u00e9signe la zone de nettet\u00e9 au sein de l\u2019image. Artistiquement, elle permet de faire le choix entre un arri\u00e8re-plan net ou flou.<\/p>\n\n\n\n<p>Plus l\u2019ouverture est grande (valeur f\/ petite), plus l\u2019arri\u00e8re-plan tend \u00e0 s\u2019estomper en un flou artistique, favoris\u00e9 par une faible profondeur de champ. \u00c0 l\u2019inverse, une petite ouverture (valeur f\/ \u00e9lev\u00e9e) engendre une profondeur de champ \u00e9tendue, avec un arri\u00e8re-plan net et d\u00e9taill\u00e9.<\/p>\n\n\n\n<figure class=\"wp-block-image size-large\"><img data-recalc-dims=\"1\" decoding=\"async\" width=\"800\" height=\"450\" src=\"https:\/\/i0.wp.com\/pierretlambert.com\/wp-content\/uploads\/2024\/11\/bases-photographie-arriere-plan-flou.jpg?resize=800%2C450&#038;ssl=1\" alt=\"portrait avec arriere plan flou exemple photographie\" class=\"wp-image-8374\" srcset=\"https:\/\/i0.wp.com\/pierretlambert.com\/wp-content\/uploads\/2024\/11\/bases-photographie-arriere-plan-flou.jpg?resize=1024%2C576&ssl=1 1024w, https:\/\/i0.wp.com\/pierretlambert.com\/wp-content\/uploads\/2024\/11\/bases-photographie-arriere-plan-flou.jpg?resize=300%2C169&ssl=1 300w, https:\/\/i0.wp.com\/pierretlambert.com\/wp-content\/uploads\/2024\/11\/bases-photographie-arriere-plan-flou.jpg?resize=768%2C432&ssl=1 768w, https:\/\/i0.wp.com\/pierretlambert.com\/wp-content\/uploads\/2024\/11\/bases-photographie-arriere-plan-flou.jpg?resize=1536%2C864&ssl=1 1536w, https:\/\/i0.wp.com\/pierretlambert.com\/wp-content\/uploads\/2024\/11\/bases-photographie-arriere-plan-flou.jpg?w=1600&ssl=1 1600w\" sizes=\"(max-width: 800px) 100vw, 800px\" \/><\/figure>\n\n\n\n<p>A noter : La valeur d\u2019ouverture minimale est conditionn\u00e9e par les qualit\u00e9s techniques de l\u2019objectif, ce minimum \u00e9tant indiqu\u00e9 sur les informations grav\u00e9es dessus. Par exemple, sur l\u2019image ci-dessous, on constate que l\u2019objectif que j\u2019utilise est un 50mm qui peut ouvrir jusqu\u2019\u00e0 f\/1.2. ce qui lui conf\u00e8re une grande capacit\u00e9 \u00e0 isoler les sujets.<\/p>\n\n\n\n<figure class=\"wp-block-image size-large\"><img data-recalc-dims=\"1\" loading=\"lazy\" decoding=\"async\" width=\"800\" height=\"450\" src=\"https:\/\/i0.wp.com\/pierretlambert.com\/wp-content\/uploads\/2024\/11\/ouverture-sur-objectif-photo.jpg?resize=800%2C450&#038;ssl=1\" alt=\"bague reglage ouverture sur objectif\" class=\"wp-image-8376\" srcset=\"https:\/\/i0.wp.com\/pierretlambert.com\/wp-content\/uploads\/2024\/11\/ouverture-sur-objectif-photo.jpg?resize=1024%2C576&ssl=1 1024w, https:\/\/i0.wp.com\/pierretlambert.com\/wp-content\/uploads\/2024\/11\/ouverture-sur-objectif-photo.jpg?resize=300%2C169&ssl=1 300w, https:\/\/i0.wp.com\/pierretlambert.com\/wp-content\/uploads\/2024\/11\/ouverture-sur-objectif-photo.jpg?resize=768%2C432&ssl=1 768w, https:\/\/i0.wp.com\/pierretlambert.com\/wp-content\/uploads\/2024\/11\/ouverture-sur-objectif-photo.jpg?resize=1536%2C864&ssl=1 1536w, https:\/\/i0.wp.com\/pierretlambert.com\/wp-content\/uploads\/2024\/11\/ouverture-sur-objectif-photo.jpg?w=1600&ssl=1 1600w\" sizes=\"(max-width: 800px) 100vw, 800px\" \/><\/figure>\n\n\n\n<p>Si les informations \u00e9taient FE4\/50 cela signifierait que l\u2019objectif ne peut pas ouvrir \u00e0 une valeur sup\u00e9rieure \u00e0 f\/4, il ne serait donc pas possible de prendre une photo \u00e0 f\/1.4 ou f\/2.8. Mais alors, pourquoi ne pas concevoir que des objectifs qui ouvrent le plus grand possible ? Tout simplement parce que la conception d\u2019un objectif \u00e0 large ouverture co\u00fbte tr\u00e8s cher, les fabricants proposent donc des objectifs pour toutes les bourses.<\/p>\n\n\n\n<p>La profondeur de champ est un outil permettant d\u2019exprimer sa vision cr\u00e9ative. Regardons ces trois photos:&nbsp;<\/p>\n\n\n\n<figure class=\"wp-block-image size-large\"><img data-recalc-dims=\"1\" loading=\"lazy\" decoding=\"async\" width=\"800\" height=\"450\" src=\"https:\/\/i0.wp.com\/pierretlambert.com\/wp-content\/uploads\/2024\/11\/ouverture-profondeur-de-champs-faible.jpg?resize=800%2C450&#038;ssl=1\" alt=\"photographie faible profondeur de champs grande ouverture\" class=\"wp-image-8378\" srcset=\"https:\/\/i0.wp.com\/pierretlambert.com\/wp-content\/uploads\/2024\/11\/ouverture-profondeur-de-champs-faible.jpg?resize=1024%2C576&ssl=1 1024w, https:\/\/i0.wp.com\/pierretlambert.com\/wp-content\/uploads\/2024\/11\/ouverture-profondeur-de-champs-faible.jpg?resize=300%2C169&ssl=1 300w, https:\/\/i0.wp.com\/pierretlambert.com\/wp-content\/uploads\/2024\/11\/ouverture-profondeur-de-champs-faible.jpg?resize=768%2C432&ssl=1 768w, https:\/\/i0.wp.com\/pierretlambert.com\/wp-content\/uploads\/2024\/11\/ouverture-profondeur-de-champs-faible.jpg?resize=1536%2C864&ssl=1 1536w, https:\/\/i0.wp.com\/pierretlambert.com\/wp-content\/uploads\/2024\/11\/ouverture-profondeur-de-champs-faible.jpg?w=1600&ssl=1 1600w\" sizes=\"(max-width: 800px) 100vw, 800px\" \/><\/figure>\n\n\n\n<figure class=\"wp-block-image size-large\"><img data-recalc-dims=\"1\" loading=\"lazy\" decoding=\"async\" width=\"800\" height=\"450\" src=\"https:\/\/i0.wp.com\/pierretlambert.com\/wp-content\/uploads\/2024\/11\/ouverture-profondeur-de-champs-moyenne.jpg?resize=800%2C450&#038;ssl=1\" alt=\"photographie moyenne profondeur de champs moyenne ouverture\" class=\"wp-image-8380\" srcset=\"https:\/\/i0.wp.com\/pierretlambert.com\/wp-content\/uploads\/2024\/11\/ouverture-profondeur-de-champs-moyenne.jpg?resize=1024%2C576&ssl=1 1024w, https:\/\/i0.wp.com\/pierretlambert.com\/wp-content\/uploads\/2024\/11\/ouverture-profondeur-de-champs-moyenne.jpg?resize=300%2C169&ssl=1 300w, https:\/\/i0.wp.com\/pierretlambert.com\/wp-content\/uploads\/2024\/11\/ouverture-profondeur-de-champs-moyenne.jpg?resize=768%2C432&ssl=1 768w, https:\/\/i0.wp.com\/pierretlambert.com\/wp-content\/uploads\/2024\/11\/ouverture-profondeur-de-champs-moyenne.jpg?resize=1536%2C864&ssl=1 1536w, https:\/\/i0.wp.com\/pierretlambert.com\/wp-content\/uploads\/2024\/11\/ouverture-profondeur-de-champs-moyenne.jpg?w=1600&ssl=1 1600w\" sizes=\"(max-width: 800px) 100vw, 800px\" \/><\/figure>\n\n\n\n<figure class=\"wp-block-image size-large\"><img data-recalc-dims=\"1\" loading=\"lazy\" decoding=\"async\" width=\"800\" height=\"450\" src=\"https:\/\/i0.wp.com\/pierretlambert.com\/wp-content\/uploads\/2024\/11\/ouverture-profondeur-de-champs-grande.jpg?resize=800%2C450&#038;ssl=1\" alt=\"photographie grande profondeur de champs petite ouverture\" class=\"wp-image-8382\" srcset=\"https:\/\/i0.wp.com\/pierretlambert.com\/wp-content\/uploads\/2024\/11\/ouverture-profondeur-de-champs-grande.jpg?resize=1024%2C576&ssl=1 1024w, https:\/\/i0.wp.com\/pierretlambert.com\/wp-content\/uploads\/2024\/11\/ouverture-profondeur-de-champs-grande.jpg?resize=300%2C169&ssl=1 300w, https:\/\/i0.wp.com\/pierretlambert.com\/wp-content\/uploads\/2024\/11\/ouverture-profondeur-de-champs-grande.jpg?resize=768%2C432&ssl=1 768w, https:\/\/i0.wp.com\/pierretlambert.com\/wp-content\/uploads\/2024\/11\/ouverture-profondeur-de-champs-grande.jpg?resize=1536%2C864&ssl=1 1536w, https:\/\/i0.wp.com\/pierretlambert.com\/wp-content\/uploads\/2024\/11\/ouverture-profondeur-de-champs-grande.jpg?w=1600&ssl=1 1600w\" sizes=\"(max-width: 800px) 100vw, 800px\" \/><\/figure>\n\n\n\n<p>On remarque tout de suite que l&rsquo;arri\u00e8re-plan n&rsquo;est pas net de la m\u00eame mani\u00e8re. \u00c0 f\/1.2, il est tr\u00e8s flou, tandis qu&rsquo;\u00e0 f\/16, il est beaucoup plus net. Ce flou artistique, qu&rsquo;on appelle le bokeh, est un effet que les photographes appr\u00e9cient pour mettre en valeur un sujet.<\/p>\n\n\n\n<p>Le choix du r\u00e9glage de l&rsquo;ouverture d\u00e9pendra donc du type de photographie envisag\u00e9, et de l\u2019effet cr\u00e9atif recherch\u00e9.<\/p>\n\n\n\n<p>Pour du portrait : une ouverture large (f\/1.8 par exemple) permettra d&rsquo;obtenir un bokeh prononc\u00e9, en rendant flou l&rsquo;arri\u00e8re plan derri\u00e8re notre sujet.<\/p>\n\n\n\n<figure class=\"wp-block-image size-large\"><img data-recalc-dims=\"1\" loading=\"lazy\" decoding=\"async\" width=\"800\" height=\"450\" src=\"https:\/\/i0.wp.com\/pierretlambert.com\/wp-content\/uploads\/2024\/11\/portrait-arriere-plan-flou.jpg?resize=800%2C450&#038;ssl=1\" alt=\"portrait photo avec arriere plan flou\" class=\"wp-image-8384\" srcset=\"https:\/\/i0.wp.com\/pierretlambert.com\/wp-content\/uploads\/2024\/11\/portrait-arriere-plan-flou.jpg?resize=1024%2C576&ssl=1 1024w, https:\/\/i0.wp.com\/pierretlambert.com\/wp-content\/uploads\/2024\/11\/portrait-arriere-plan-flou.jpg?resize=300%2C169&ssl=1 300w, https:\/\/i0.wp.com\/pierretlambert.com\/wp-content\/uploads\/2024\/11\/portrait-arriere-plan-flou.jpg?resize=768%2C432&ssl=1 768w, https:\/\/i0.wp.com\/pierretlambert.com\/wp-content\/uploads\/2024\/11\/portrait-arriere-plan-flou.jpg?resize=1536%2C864&ssl=1 1536w, https:\/\/i0.wp.com\/pierretlambert.com\/wp-content\/uploads\/2024\/11\/portrait-arriere-plan-flou.jpg?w=1600&ssl=1 1600w\" sizes=\"(max-width: 800px) 100vw, 800px\" \/><\/figure>\n\n\n\n<p>Pour des photos de groupe :\u00a0 une grande ouverture risque de ne pas permettre une profondeur de champ suffisante pour que tout le monde soit bien net sur la photo. Il faudra donc fermer un peu, autour de f\/4 par exemple.<\/p>\n\n\n\n<p>Pour des photos de paysage ou de rue : tout d\u00e9pend de l\u2019effet cr\u00e9atif recherch\u00e9. Si tu veux\u00a0 faire passer beaucoup d&rsquo;informations et avoir un arri\u00e8re-plan net tu pourras fermer autour de f\/8 ou f\/11. Pour cr\u00e9er un arri\u00e8re-plan bien cr\u00e9meux qui dispara\u00eet il faut, \u00e0 l\u2019inverse, choisir grande ouverture (un chiffre f\/ qui est tr\u00e8s petit).<\/p>\n\n\n\n<figure class=\"wp-block-image size-large\"><img data-recalc-dims=\"1\" loading=\"lazy\" decoding=\"async\" width=\"800\" height=\"450\" src=\"https:\/\/i0.wp.com\/pierretlambert.com\/wp-content\/uploads\/2024\/11\/petite-ouverture-context-photographie.jpg?resize=800%2C450&#038;ssl=1\" alt=\"petite ouverture ajouter contexte dans photographie\" class=\"wp-image-8386\" srcset=\"https:\/\/i0.wp.com\/pierretlambert.com\/wp-content\/uploads\/2024\/11\/petite-ouverture-context-photographie.jpg?resize=1024%2C576&ssl=1 1024w, https:\/\/i0.wp.com\/pierretlambert.com\/wp-content\/uploads\/2024\/11\/petite-ouverture-context-photographie.jpg?resize=300%2C169&ssl=1 300w, https:\/\/i0.wp.com\/pierretlambert.com\/wp-content\/uploads\/2024\/11\/petite-ouverture-context-photographie.jpg?resize=768%2C432&ssl=1 768w, https:\/\/i0.wp.com\/pierretlambert.com\/wp-content\/uploads\/2024\/11\/petite-ouverture-context-photographie.jpg?w=1280&ssl=1 1280w\" sizes=\"(max-width: 800px) 100vw, 800px\" \/><\/figure>\n\n\n\n<p>Astuce : Afin d\u2019\u00e9viter que toutes les poussi\u00e8res pr\u00e9sentes sur ton objectif ou ton capteur ne soient pas visibles sur ta photo, je te conseille de maintenir ton ouverture dans des valeurs qui ne soient pas trop ferm\u00e9es (\u00e9viter au-del\u00e0 de f\/16 ou f\/22). Cette astuce vaut \u00e9galement lorsque tu shootes \u00e0 travers une vitre, afin d\u2019\u00e9viter que les salet\u00e9s qui se trouvent dessus soient visibles en avant-plan.<\/p>\n\n\n\n<figure class=\"wp-block-image size-large\"><img data-recalc-dims=\"1\" loading=\"lazy\" decoding=\"async\" width=\"800\" height=\"450\" src=\"https:\/\/i0.wp.com\/pierretlambert.com\/wp-content\/uploads\/2024\/11\/probleme-petite-ouverture-taches-images.jpg?resize=800%2C450&#038;ssl=1\" alt=\"probleme taches sur photos avec grande ouverture\" class=\"wp-image-8388\" srcset=\"https:\/\/i0.wp.com\/pierretlambert.com\/wp-content\/uploads\/2024\/11\/probleme-petite-ouverture-taches-images.jpg?resize=1024%2C576&ssl=1 1024w, https:\/\/i0.wp.com\/pierretlambert.com\/wp-content\/uploads\/2024\/11\/probleme-petite-ouverture-taches-images.jpg?resize=300%2C169&ssl=1 300w, https:\/\/i0.wp.com\/pierretlambert.com\/wp-content\/uploads\/2024\/11\/probleme-petite-ouverture-taches-images.jpg?resize=768%2C432&ssl=1 768w, https:\/\/i0.wp.com\/pierretlambert.com\/wp-content\/uploads\/2024\/11\/probleme-petite-ouverture-taches-images.jpg?resize=1536%2C864&ssl=1 1536w, https:\/\/i0.wp.com\/pierretlambert.com\/wp-content\/uploads\/2024\/11\/probleme-petite-ouverture-taches-images.jpg?w=1600&ssl=1 1600w\" sizes=\"(max-width: 800px) 100vw, 800px\" \/><\/figure>\n\n\n\n<p>Tu as d\u00e9j\u00e0 fait un premier choix artistique en d\u00e9terminant la profondeur de champ. \u00c0 pr\u00e9sent, tu dois d\u00e9cider si tu souhaites figer le mouvement ou le laisser s&rsquo;estomper.<\/p>\n\n\n\n<figure class=\"wp-block-image size-large\"><img data-recalc-dims=\"1\" loading=\"lazy\" decoding=\"async\" width=\"800\" height=\"450\" src=\"https:\/\/i0.wp.com\/pierretlambert.com\/wp-content\/uploads\/2024\/11\/comment-choisir-louverture-en-photographie-profondeur.jpg?resize=800%2C450&#038;ssl=1\" alt=\"graphique sur le role de l'ouverture de l'objectif en photographie\" class=\"wp-image-8406\" srcset=\"https:\/\/i0.wp.com\/pierretlambert.com\/wp-content\/uploads\/2024\/11\/comment-choisir-louverture-en-photographie-profondeur.jpg?resize=1024%2C576&ssl=1 1024w, https:\/\/i0.wp.com\/pierretlambert.com\/wp-content\/uploads\/2024\/11\/comment-choisir-louverture-en-photographie-profondeur.jpg?resize=300%2C169&ssl=1 300w, https:\/\/i0.wp.com\/pierretlambert.com\/wp-content\/uploads\/2024\/11\/comment-choisir-louverture-en-photographie-profondeur.jpg?resize=768%2C432&ssl=1 768w, https:\/\/i0.wp.com\/pierretlambert.com\/wp-content\/uploads\/2024\/11\/comment-choisir-louverture-en-photographie-profondeur.jpg?resize=1536%2C864&ssl=1 1536w, https:\/\/i0.wp.com\/pierretlambert.com\/wp-content\/uploads\/2024\/11\/comment-choisir-louverture-en-photographie-profondeur.jpg?w=1600&ssl=1 1600w\" sizes=\"(max-width: 800px) 100vw, 800px\" \/><\/figure>\n\n\n\n<iframe\n  src=\"https:\/\/link.coursecreator360.com\/widget\/form\/k7wQE18x7k6Z7T8DnoJF\"\n  style=\"width:100%;height:100%;border:none;border-radius:3px\"\n  id=\"inline-k7wQE18x7k6Z7T8DnoJF\" \n  data-layout=\"{'id':'INLINE'}\"\n  data-trigger-type=\"alwaysShow\"\n  data-trigger-value=\"\"\n  data-activation-type=\"alwaysActivated\"\n  data-activation-value=\"\"\n  data-deactivation-type=\"neverDeactivate\"\n  data-deactivation-value=\"\"\n  data-form-name=\"FR - Blog In Line - Fiche R\u00e9glages\"\n  data-height=\"480\"\n  data-layout-iframe-id=\"inline-k7wQE18x7k6Z7T8DnoJF\"\n  data-form-id=\"k7wQE18x7k6Z7T8DnoJF\"\n  title=\"FR - Blog In Line - Fiche R\u00e9glages\"\n      >\n<\/iframe>\n<script src=\"https:\/\/link.coursecreator360.com\/js\/form_embed.js\"><\/script>\n\n\n\n<h2 class=\"wp-block-heading\"><strong>La vitesse d\u2019obturation : ma\u00eetriser le mouvement<\/strong><\/h2>\n\n\n\n<p>La vitesse d&rsquo;obturation permet de ma\u00eetriser le rendu du mouvement. Plus elle est \u00e9lev\u00e9e, plus le sujet en mouvement appara\u00eet net et fig\u00e9. A l\u2019inverse, plus la vitesse est lente, plus le sujet qui bouge sera flou.<\/p>\n\n\n\n<p>Les valeurs de la vitesse s\u2019expriment en fractions de secondes 1\/125s, 1\/2000s ou en secondes 1s, 30s\u2026<\/p>\n\n\n\n<p>Lorsque le capteur re\u00e7oit de la lumi\u00e8re plus longtemps que quelques fractions de secondes (1s, plusieurs secondes, voire minutes) on parle de pose longue. Cette technique permet de flouter le mouvement et de capter plus de lumi\u00e8re.<\/p>\n\n\n\n<p>Voici un exemple de pose longue : comme tu le constates le sujet en mouvement est flou.<\/p>\n\n\n\n<figure class=\"wp-block-image size-large\"><img data-recalc-dims=\"1\" loading=\"lazy\" decoding=\"async\" width=\"800\" height=\"450\" src=\"https:\/\/i0.wp.com\/pierretlambert.com\/wp-content\/uploads\/2024\/11\/pose-longue-photographie.jpg?resize=800%2C450&#038;ssl=1\" alt=\"pose longue photographie trainee de lumiere vitesse d'obturation tres lente\" class=\"wp-image-8390\" srcset=\"https:\/\/i0.wp.com\/pierretlambert.com\/wp-content\/uploads\/2024\/11\/pose-longue-photographie.jpg?resize=1024%2C576&ssl=1 1024w, https:\/\/i0.wp.com\/pierretlambert.com\/wp-content\/uploads\/2024\/11\/pose-longue-photographie.jpg?resize=300%2C169&ssl=1 300w, https:\/\/i0.wp.com\/pierretlambert.com\/wp-content\/uploads\/2024\/11\/pose-longue-photographie.jpg?resize=768%2C432&ssl=1 768w, https:\/\/i0.wp.com\/pierretlambert.com\/wp-content\/uploads\/2024\/11\/pose-longue-photographie.jpg?resize=1536%2C864&ssl=1 1536w, https:\/\/i0.wp.com\/pierretlambert.com\/wp-content\/uploads\/2024\/11\/pose-longue-photographie.jpg?w=1600&ssl=1 1600w\" sizes=\"(max-width: 800px) 100vw, 800px\" \/><\/figure>\n\n\n\n<p>En revanche, sur cette photographie, le sujet qui bouge est net.<\/p>\n\n\n\n<figure class=\"wp-block-image size-large\"><img data-recalc-dims=\"1\" loading=\"lazy\" decoding=\"async\" width=\"800\" height=\"450\" src=\"https:\/\/i0.wp.com\/pierretlambert.com\/wp-content\/uploads\/2024\/11\/vitesse-obturation-sujet-fige.jpg?resize=800%2C450&#038;ssl=1\" alt=\"sujet fig\u00e9 avec vitesse d'obturation rapide\" class=\"wp-image-8392\" srcset=\"https:\/\/i0.wp.com\/pierretlambert.com\/wp-content\/uploads\/2024\/11\/vitesse-obturation-sujet-fige.jpg?resize=1024%2C576&ssl=1 1024w, https:\/\/i0.wp.com\/pierretlambert.com\/wp-content\/uploads\/2024\/11\/vitesse-obturation-sujet-fige.jpg?resize=300%2C169&ssl=1 300w, https:\/\/i0.wp.com\/pierretlambert.com\/wp-content\/uploads\/2024\/11\/vitesse-obturation-sujet-fige.jpg?resize=768%2C432&ssl=1 768w, https:\/\/i0.wp.com\/pierretlambert.com\/wp-content\/uploads\/2024\/11\/vitesse-obturation-sujet-fige.jpg?resize=1536%2C864&ssl=1 1536w, https:\/\/i0.wp.com\/pierretlambert.com\/wp-content\/uploads\/2024\/11\/vitesse-obturation-sujet-fige.jpg?w=1600&ssl=1 1600w\" sizes=\"(max-width: 800px) 100vw, 800px\" \/><\/figure>\n\n\n\n<p>Il n\u2019est pas toujours ais\u00e9 au d\u00e9part de comprendre quelle vitesse d\u2019obturation convient le mieux pour figer un sujet. Afin de t\u2019aider, je partage avec toi les r\u00e9glages que j\u2019utilise la plupart du temps :<\/p>\n\n\n\n<p><strong>Sujets statiques ou \u00e0 mouvement tr\u00e8s lent :<\/strong> 1\/50e de seconde est g\u00e9n\u00e9ralement suffisant.<\/p>\n\n\n\n<p><strong>Personnes marchant \u00e0 un rythme tranquille :<\/strong> 1\/125e de seconde minimum<\/p>\n\n\n\n<p><strong>Personnes marchant rapidement :<\/strong> 1\/250e de seconde<\/p>\n\n\n\n<p><strong>Sujets rapides (sportifs, animaux) :<\/strong> de 1\/500e de seconde \u00e0 1\/3000<sup>e<\/sup> pour des sujets tr\u00e8s rapides<\/p>\n\n\n\n<figure class=\"wp-block-image size-large\"><img data-recalc-dims=\"1\" loading=\"lazy\" decoding=\"async\" width=\"800\" height=\"450\" src=\"https:\/\/i0.wp.com\/pierretlambert.com\/wp-content\/uploads\/2024\/11\/vitesse-obturation-sujet-flou.jpg?resize=800%2C450&#038;ssl=1\" alt=\"pose longue photographie exemple sujet flou de nuit\" class=\"wp-image-8394\" srcset=\"https:\/\/i0.wp.com\/pierretlambert.com\/wp-content\/uploads\/2024\/11\/vitesse-obturation-sujet-flou.jpg?resize=1024%2C576&ssl=1 1024w, https:\/\/i0.wp.com\/pierretlambert.com\/wp-content\/uploads\/2024\/11\/vitesse-obturation-sujet-flou.jpg?resize=300%2C169&ssl=1 300w, https:\/\/i0.wp.com\/pierretlambert.com\/wp-content\/uploads\/2024\/11\/vitesse-obturation-sujet-flou.jpg?resize=768%2C432&ssl=1 768w, https:\/\/i0.wp.com\/pierretlambert.com\/wp-content\/uploads\/2024\/11\/vitesse-obturation-sujet-flou.jpg?resize=1536%2C864&ssl=1 1536w, https:\/\/i0.wp.com\/pierretlambert.com\/wp-content\/uploads\/2024\/11\/vitesse-obturation-sujet-flou.jpg?w=1600&ssl=1 1600w\" sizes=\"(max-width: 800px) 100vw, 800px\" \/><\/figure>\n\n\n\n<p>Il pourrait \u00eatre tentant de toujours vouloir utiliser une vitesse \u00e9lev\u00e9e, mais il ne faut pas perdre de vue que ce param\u00e8tre influence \u00e9galement la lumi\u00e8re.<strong> <\/strong>Plus la vitesse est rapide, moins la lumi\u00e8re atteint le capteur. C\u2019est comme si tu ouvrais les yeux qu\u2019une fraction de seconde, tu verras moins bien que si tu les ouvres plusieurs secondes.<\/p>\n\n\n\n<p>Lorsque tu prends des photos de nuit dans des conditions de faible luminosit\u00e9, il est donc indispensable d&rsquo;utiliser des vitesses d&rsquo;obturation tr\u00e8s lentes afin de laisser le temps au capteur de recevoir suffisamment de lumi\u00e8re. Utilise des vitesses comme 5, 10, voire 30 secondes. Toutefois, ces vitesses ne permettent pas de figer le mouvement.<\/p>\n\n\n\n<figure class=\"wp-block-image size-large\"><img data-recalc-dims=\"1\" loading=\"lazy\" decoding=\"async\" width=\"800\" height=\"450\" src=\"https:\/\/i0.wp.com\/pierretlambert.com\/wp-content\/uploads\/2024\/11\/pose-rapide-photographie.jpg?resize=800%2C450&#038;ssl=1\" alt=\"pose tres rapide photographie sujet fige\" class=\"wp-image-8396\" srcset=\"https:\/\/i0.wp.com\/pierretlambert.com\/wp-content\/uploads\/2024\/11\/pose-rapide-photographie.jpg?resize=1024%2C576&ssl=1 1024w, https:\/\/i0.wp.com\/pierretlambert.com\/wp-content\/uploads\/2024\/11\/pose-rapide-photographie.jpg?resize=300%2C169&ssl=1 300w, https:\/\/i0.wp.com\/pierretlambert.com\/wp-content\/uploads\/2024\/11\/pose-rapide-photographie.jpg?resize=768%2C432&ssl=1 768w, https:\/\/i0.wp.com\/pierretlambert.com\/wp-content\/uploads\/2024\/11\/pose-rapide-photographie.jpg?resize=1536%2C864&ssl=1 1536w, https:\/\/i0.wp.com\/pierretlambert.com\/wp-content\/uploads\/2024\/11\/pose-rapide-photographie.jpg?w=1600&ssl=1 1600w\" sizes=\"(max-width: 800px) 100vw, 800px\" \/><\/figure>\n\n\n\n<p>Astuce : Pour \u00e9viter tout flou de bouger sur des sujets statiques en pause longue, je te conseille d&rsquo;utiliser <a href=\"https:\/\/geni.us\/8bluetw\" target=\"_blank\" rel=\"noreferrer noopener\">un tr\u00e9pied<\/a>, voire un retardateur car m\u00eame toi lorsque tu appuies sur le d\u00e9clencheur tu vas faire bouger l\u2019appareil.<\/p>\n\n\n\n<p>Gr\u00e2ce \u00e0 ces r\u00e9glages de l\u2019ouverture et de la vitesse, tu auras la possibilit\u00e9 de choisir si tu veux figer les \u00e9l\u00e9ments en mouvement ou cr\u00e9er un effet de flou artistique et avoir des d\u00e9tails ou pas en arri\u00e8re plan en fonction de l&rsquo;ambiance que tu souhaites donner \u00e0 ta photo.<\/p>\n\n\n\n<p>Maintenant que faire si l&rsquo;image est trop sombre \u00e0 cause des r\u00e9glages choisis ?\u00a0 C\u2019est l\u00e0 qu\u2019entre en jeu le dernier param\u00e8tre du triangle d\u2019exposition : la sensibilit\u00e9 ISO<\/p>\n\n\n\n<figure class=\"wp-block-image size-large\"><img data-recalc-dims=\"1\" loading=\"lazy\" decoding=\"async\" width=\"800\" height=\"450\" src=\"https:\/\/i0.wp.com\/pierretlambert.com\/wp-content\/uploads\/2024\/11\/comment-choisir-vitesse-obturation-photographie-fige-flou.jpg?resize=800%2C450&#038;ssl=1\" alt=\"graphique sur le role de la vitesse d'obturation en photographie\" class=\"wp-image-8408\" srcset=\"https:\/\/i0.wp.com\/pierretlambert.com\/wp-content\/uploads\/2024\/11\/comment-choisir-vitesse-obturation-photographie-fige-flou.jpg?resize=1024%2C576&ssl=1 1024w, https:\/\/i0.wp.com\/pierretlambert.com\/wp-content\/uploads\/2024\/11\/comment-choisir-vitesse-obturation-photographie-fige-flou.jpg?resize=300%2C169&ssl=1 300w, https:\/\/i0.wp.com\/pierretlambert.com\/wp-content\/uploads\/2024\/11\/comment-choisir-vitesse-obturation-photographie-fige-flou.jpg?resize=768%2C432&ssl=1 768w, https:\/\/i0.wp.com\/pierretlambert.com\/wp-content\/uploads\/2024\/11\/comment-choisir-vitesse-obturation-photographie-fige-flou.jpg?resize=1536%2C864&ssl=1 1536w, https:\/\/i0.wp.com\/pierretlambert.com\/wp-content\/uploads\/2024\/11\/comment-choisir-vitesse-obturation-photographie-fige-flou.jpg?w=1600&ssl=1 1600w\" sizes=\"(max-width: 800px) 100vw, 800px\" \/><\/figure>\n\n\n\n<h2 class=\"wp-block-heading\"><strong>La sensibilit\u00e9 ISO : amplifier la lumi\u00e8re<\/strong><\/h2>\n\n\n\n<p>Lorsque l&rsquo;image est trop sombre \u00e0 cause de son choix de vitesse d&rsquo;obturation ou d&rsquo;ouverture, il est possible d\u2019\u00e9claircir son image en utilisant le dernier param\u00e8tre du triangle d\u2019exposition, la sensibilit\u00e9 ISO.<\/p>\n\n\n\n<p>L&rsquo;ISO, c&rsquo;est un peu comme un amplificateur de la lumi\u00e8re dans notre appareil photo. Plus on monte l&rsquo;ISO (plus le chiffre est \u00e9lev\u00e9), plus le capteur amplifie la lumi\u00e8re et plus notre photo sera claire.<\/p>\n\n\n\n<p>Les valeurs ISO sont g\u00e9n\u00e9ralement exprim\u00e9es en nombres entiers : ISO 100, 200, 400, 800, 1600, 3200 et ainsi de suite.<\/p>\n\n\n\n<figure class=\"wp-block-image size-large\"><img data-recalc-dims=\"1\" loading=\"lazy\" decoding=\"async\" width=\"800\" height=\"450\" src=\"https:\/\/i0.wp.com\/pierretlambert.com\/wp-content\/uploads\/2024\/11\/iso-sensibilite-photographie-bruit.jpg?resize=800%2C450&#038;ssl=1\" alt=\"sensibilit\u00e9 ISO choisir lumiere\" class=\"wp-image-8398\" srcset=\"https:\/\/i0.wp.com\/pierretlambert.com\/wp-content\/uploads\/2024\/11\/iso-sensibilite-photographie-bruit.jpg?resize=1024%2C576&ssl=1 1024w, https:\/\/i0.wp.com\/pierretlambert.com\/wp-content\/uploads\/2024\/11\/iso-sensibilite-photographie-bruit.jpg?resize=300%2C169&ssl=1 300w, https:\/\/i0.wp.com\/pierretlambert.com\/wp-content\/uploads\/2024\/11\/iso-sensibilite-photographie-bruit.jpg?resize=768%2C432&ssl=1 768w, https:\/\/i0.wp.com\/pierretlambert.com\/wp-content\/uploads\/2024\/11\/iso-sensibilite-photographie-bruit.jpg?resize=1536%2C864&ssl=1 1536w, https:\/\/i0.wp.com\/pierretlambert.com\/wp-content\/uploads\/2024\/11\/iso-sensibilite-photographie-bruit.jpg?w=1600&ssl=1 1600w\" sizes=\"(max-width: 800px) 100vw, 800px\" \/><\/figure>\n\n\n\n<p>Mais attention, si augmenter l&rsquo;ISO amplifie la luminosit\u00e9 de la photo, c\u2019est au prix de l\u2019ajout d\u2019un grain num\u00e9rique appel\u00e9 bruit. Ce bruit peut alt\u00e9rer la qualit\u00e9 visuelle de la photo. Un peu comme si on augmentait le volume de la t\u00e9l\u00e9vision : on entend mieux, mais on entend aussi plus de parasites. Ce bruit est particuli\u00e8rement visible dans les zones sombres de l&rsquo;image. Pour le minimiser, il convient donc de garder l\u2019ISO le plus bas possible.<\/p>\n\n\n\n<figure class=\"wp-block-image size-large\"><img data-recalc-dims=\"1\" loading=\"lazy\" decoding=\"async\" width=\"800\" height=\"450\" src=\"https:\/\/i0.wp.com\/pierretlambert.com\/wp-content\/uploads\/2024\/11\/iso-64000-photographie-avec-du-bruit.jpg?resize=800%2C450&#038;ssl=1\" alt=\"exemple bruit image iso 64000 dans photographie\" class=\"wp-image-8400\" srcset=\"https:\/\/i0.wp.com\/pierretlambert.com\/wp-content\/uploads\/2024\/11\/iso-64000-photographie-avec-du-bruit.jpg?resize=1024%2C576&ssl=1 1024w, https:\/\/i0.wp.com\/pierretlambert.com\/wp-content\/uploads\/2024\/11\/iso-64000-photographie-avec-du-bruit.jpg?resize=300%2C169&ssl=1 300w, https:\/\/i0.wp.com\/pierretlambert.com\/wp-content\/uploads\/2024\/11\/iso-64000-photographie-avec-du-bruit.jpg?resize=768%2C432&ssl=1 768w, https:\/\/i0.wp.com\/pierretlambert.com\/wp-content\/uploads\/2024\/11\/iso-64000-photographie-avec-du-bruit.jpg?resize=1536%2C864&ssl=1 1536w, https:\/\/i0.wp.com\/pierretlambert.com\/wp-content\/uploads\/2024\/11\/iso-64000-photographie-avec-du-bruit.jpg?w=1600&ssl=1 1600w\" sizes=\"(max-width: 800px) 100vw, 800px\" \/><\/figure>\n\n\n\n<p>Trouver le bon r\u00e9glage est une question d&rsquo;\u00e9quilibre. Il faut augmenter l&rsquo;ISO juste ce qu&rsquo;il faut pour avoir une photo suffisamment lumineuse, sans pour autant que le bruit devienne trop g\u00eanant.<\/p>\n\n\n\n<p>En plein jour, on peut se permettre des ISO bas : ISO 100, 200 etc,\u00a0 mais en int\u00e9rieur ou de nuit, il faudra augmenter les ISO pour compenser le manque de lumi\u00e8re. Je me retrouve souvent avec des ISO \u00e9lev\u00e9s (au-del\u00e0 de 1600) si je souhaite conserver mes choix cr\u00e9atifs effectu\u00e9s en r\u00e9glant mon ouverture et ma vitesse, concernant la profondeur de champ et la nettet\u00e9 du sujet en mouvement.<\/p>\n\n\n\n<p>Chaque appareil photo a ses propres caract\u00e9ristiques et une gestion diff\u00e9rente du bruit.\u00a0 Certains en produisent moins que d&rsquo;autres \u00e0 ISO \u00e9lev\u00e9s. Mais n&rsquo;ayez pas peur du bruit, il peut \u00eatre r\u00e9duit en post-traitement avec un logiciel de retouche photo. Il vaut mieux une photo avec un peu de bruit qu\u2019une photo rat\u00e9e.<\/p>\n\n\n\n<figure class=\"wp-block-image size-large\"><img data-recalc-dims=\"1\" loading=\"lazy\" decoding=\"async\" width=\"800\" height=\"450\" src=\"https:\/\/i0.wp.com\/pierretlambert.com\/wp-content\/uploads\/2024\/11\/comment-regler-les-iso.jpg?resize=800%2C450&#038;ssl=1\" alt=\"comment regler les iso\" class=\"wp-image-8402\" srcset=\"https:\/\/i0.wp.com\/pierretlambert.com\/wp-content\/uploads\/2024\/11\/comment-regler-les-iso.jpg?resize=1024%2C576&ssl=1 1024w, https:\/\/i0.wp.com\/pierretlambert.com\/wp-content\/uploads\/2024\/11\/comment-regler-les-iso.jpg?resize=300%2C169&ssl=1 300w, https:\/\/i0.wp.com\/pierretlambert.com\/wp-content\/uploads\/2024\/11\/comment-regler-les-iso.jpg?resize=768%2C432&ssl=1 768w, https:\/\/i0.wp.com\/pierretlambert.com\/wp-content\/uploads\/2024\/11\/comment-regler-les-iso.jpg?resize=1536%2C864&ssl=1 1536w, https:\/\/i0.wp.com\/pierretlambert.com\/wp-content\/uploads\/2024\/11\/comment-regler-les-iso.jpg?w=1600&ssl=1 1600w\" sizes=\"(max-width: 800px) 100vw, 800px\" \/><\/figure>\n\n\n\n<p>D\u00e9sormais vous avez toutes les cl\u00e9s en main pour ma\u00eetriser les bases de la photographie.<\/p>\n\n\n\n<p><strong>En r\u00e9sum\u00e9 cr\u00e9ativement:<\/strong><\/p>\n\n\n\n<p><strong>L&rsquo;Ouverture :<\/strong> D\u00e9termine la profondeur de champ;<\/p>\n\n\n\n<p><strong>La Vitesse d&rsquo;obturation :<\/strong> Contr\u00f4le le mouvement, d\u00e9termine si le sujet est fig\u00e9 ou flou;<\/p>\n\n\n\n<p><strong>Le chiffre ISO :<\/strong> Ajuste la sensibilit\u00e9 \u00e0 la lumi\u00e8re pour l\u2019adapter aux choix cr\u00e9atifs;<\/p>\n\n\n\n<p><strong>Le plus important :<\/strong> La photographie est une question d&rsquo;\u00e9quilibre. Exp\u00e9rimente ces param\u00e8tres pour trouver les r\u00e9glages qui correspondent le mieux \u00e0 ta vision artistique. N&rsquo;h\u00e9site pas \u00e0 prendre de nombreuses photos avec des valeurs diff\u00e9rentes et \u00e0 comparer le r\u00e9sultat.<\/p>\n\n\n\n<figure class=\"wp-block-image size-large\"><img data-recalc-dims=\"1\" loading=\"lazy\" decoding=\"async\" width=\"800\" height=\"450\" src=\"https:\/\/i0.wp.com\/pierretlambert.com\/wp-content\/uploads\/2024\/11\/PHOTO-APERTURE-SHUTTER-SPEED-ISO-EFFECT-RECAP-FR.jpg?resize=800%2C450&#038;ssl=1\" alt=\"r\u00e9gler son appareil photo en manuel ouverture, iso et vitesse d'obturation\" class=\"wp-image-8670\" srcset=\"https:\/\/i0.wp.com\/pierretlambert.com\/wp-content\/uploads\/2024\/11\/PHOTO-APERTURE-SHUTTER-SPEED-ISO-EFFECT-RECAP-FR.jpg?resize=1024%2C576&ssl=1 1024w, https:\/\/i0.wp.com\/pierretlambert.com\/wp-content\/uploads\/2024\/11\/PHOTO-APERTURE-SHUTTER-SPEED-ISO-EFFECT-RECAP-FR.jpg?resize=300%2C169&ssl=1 300w, https:\/\/i0.wp.com\/pierretlambert.com\/wp-content\/uploads\/2024\/11\/PHOTO-APERTURE-SHUTTER-SPEED-ISO-EFFECT-RECAP-FR.jpg?resize=768%2C432&ssl=1 768w, https:\/\/i0.wp.com\/pierretlambert.com\/wp-content\/uploads\/2024\/11\/PHOTO-APERTURE-SHUTTER-SPEED-ISO-EFFECT-RECAP-FR.jpg?resize=1536%2C864&ssl=1 1536w, https:\/\/i0.wp.com\/pierretlambert.com\/wp-content\/uploads\/2024\/11\/PHOTO-APERTURE-SHUTTER-SPEED-ISO-EFFECT-RECAP-FR.jpg?w=1920&ssl=1 1920w, https:\/\/i0.wp.com\/pierretlambert.com\/wp-content\/uploads\/2024\/11\/PHOTO-APERTURE-SHUTTER-SPEED-ISO-EFFECT-RECAP-FR.jpg?w=1600&ssl=1 1600w\" sizes=\"(max-width: 800px) 100vw, 800px\" \/><\/figure>\n\n\n\n<p>Pour t&rsquo;aider \u00e0 approfondir ces r\u00e9glages de base, je te propose une fiche de r\u00e9glages gratuite. Tu y trouveras mes param\u00e8tres pr\u00e9f\u00e9r\u00e9s pour les photos de paysages, de jour comme de nuit, et de nombreuses astuces. <strong>T\u00e9l\u00e9charge-la maintenant<\/strong> et commence \u00e0 exp\u00e9rimenter !<\/p>\n\n\n\n<iframe\n  src=\"https:\/\/link.coursecreator360.com\/widget\/form\/k7wQE18x7k6Z7T8DnoJF\"\n  style=\"width:100%;height:100%;border:none;border-radius:3px\"\n  id=\"inline-k7wQE18x7k6Z7T8DnoJF\" \n  data-layout=\"{'id':'INLINE'}\"\n  data-trigger-type=\"alwaysShow\"\n  data-trigger-value=\"\"\n  data-activation-type=\"alwaysActivated\"\n  data-activation-value=\"\"\n  data-deactivation-type=\"neverDeactivate\"\n  data-deactivation-value=\"\"\n  data-form-name=\"FR - Blog In Line - Fiche R\u00e9glages\"\n  data-height=\"480\"\n  data-layout-iframe-id=\"inline-k7wQE18x7k6Z7T8DnoJF\"\n  data-form-id=\"k7wQE18x7k6Z7T8DnoJF\"\n  title=\"FR - Blog In Line - Fiche R\u00e9glages\"\n      >\n<\/iframe>\n<script src=\"https:\/\/link.coursecreator360.com\/js\/form_embed.js\"><\/script>\n\n\n\n<figure class=\"wp-block-image size-large\"><img data-recalc-dims=\"1\" loading=\"lazy\" decoding=\"async\" width=\"800\" height=\"450\" src=\"https:\/\/i0.wp.com\/pierretlambert.com\/wp-content\/uploads\/2024\/11\/mode-manuel-sur-appareil-photo.jpg?resize=800%2C450&#038;ssl=1\" alt=\"mode manuel sur appareil photo\" class=\"wp-image-8404\" srcset=\"https:\/\/i0.wp.com\/pierretlambert.com\/wp-content\/uploads\/2024\/11\/mode-manuel-sur-appareil-photo.jpg?resize=1024%2C576&ssl=1 1024w, https:\/\/i0.wp.com\/pierretlambert.com\/wp-content\/uploads\/2024\/11\/mode-manuel-sur-appareil-photo.jpg?resize=300%2C169&ssl=1 300w, https:\/\/i0.wp.com\/pierretlambert.com\/wp-content\/uploads\/2024\/11\/mode-manuel-sur-appareil-photo.jpg?resize=768%2C432&ssl=1 768w, https:\/\/i0.wp.com\/pierretlambert.com\/wp-content\/uploads\/2024\/11\/mode-manuel-sur-appareil-photo.jpg?resize=1536%2C864&ssl=1 1536w, https:\/\/i0.wp.com\/pierretlambert.com\/wp-content\/uploads\/2024\/11\/mode-manuel-sur-appareil-photo.jpg?w=1600&ssl=1 1600w\" sizes=\"(max-width: 800px) 100vw, 800px\" \/><\/figure>\n\n\n\n<p>L\u2019ouverture, la vitesse et les ISO permettent en r\u00e9alit\u00e9 d\u2019utiliser le mode manuel. Malgr\u00e9 tout, si tout ceci te semble trop complexe, je te t\u2019invite \u00e0 utiliser les modes que j\u2019utilise au quotidien pour simplifier tout cela, les modes semi-automatiques.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\"><strong>D\u00e9passer le mode automatique avec les modes semi-automatiques<\/strong><\/h2>\n\n\n\n<p>Un mode semi-automatique est un r\u00e9glage offrant un juste milieu entre le mode enti\u00e8rement automatique et le mode manuel. Il permet d&rsquo;avoir un certain contr\u00f4le sur les choix artistiques tout en laissant l&rsquo;appareil g\u00e9rer une partie des param\u00e8tres.<\/p>\n\n\n\n<p>Dans les modes semi-automatiques, on choisit de prioriser un param\u00e8tre sp\u00e9cifique :<\/p>\n\n\n\n<p><strong>Priorit\u00e9 \u00e0 l&rsquo;ouverture (Av ou A) :<\/strong> On choisit uniquement l&rsquo;ouverture (f\/) de l&rsquo;objectif, qui d\u00e9termine la profondeur de champ (la zone nette de l&rsquo;image) et l&rsquo;appareil ajuste automatiquement la vitesse d&rsquo;obturation et la sensibilit\u00e9 ISO pour obtenir une exposition correcte.&nbsp;&nbsp;<\/p>\n\n\n\n<figure class=\"wp-block-image size-large\"><img data-recalc-dims=\"1\" loading=\"lazy\" decoding=\"async\" width=\"800\" height=\"450\" src=\"https:\/\/i0.wp.com\/pierretlambert.com\/wp-content\/uploads\/2024\/11\/comment-choisir-louverture-en-photographie-profondeur.jpg?resize=800%2C450&#038;ssl=1\" alt=\"comment choisir l'ouverture et la profondeur de champs en photographie\" class=\"wp-image-8406\" srcset=\"https:\/\/i0.wp.com\/pierretlambert.com\/wp-content\/uploads\/2024\/11\/comment-choisir-louverture-en-photographie-profondeur.jpg?resize=1024%2C576&ssl=1 1024w, https:\/\/i0.wp.com\/pierretlambert.com\/wp-content\/uploads\/2024\/11\/comment-choisir-louverture-en-photographie-profondeur.jpg?resize=300%2C169&ssl=1 300w, https:\/\/i0.wp.com\/pierretlambert.com\/wp-content\/uploads\/2024\/11\/comment-choisir-louverture-en-photographie-profondeur.jpg?resize=768%2C432&ssl=1 768w, https:\/\/i0.wp.com\/pierretlambert.com\/wp-content\/uploads\/2024\/11\/comment-choisir-louverture-en-photographie-profondeur.jpg?resize=1536%2C864&ssl=1 1536w, https:\/\/i0.wp.com\/pierretlambert.com\/wp-content\/uploads\/2024\/11\/comment-choisir-louverture-en-photographie-profondeur.jpg?w=1600&ssl=1 1600w\" sizes=\"(max-width: 800px) 100vw, 800px\" \/><\/figure>\n\n\n\n<p><strong>Priorit\u00e9 \u00e0 la vitesse (Tv ou S) :<\/strong> On choisit la vitesse d&rsquo;obturation, qui d\u00e9termine si un sujet en mouvement sera fig\u00e9 ou flou, l&rsquo;appareil ajuste l&rsquo;ouverture et l&rsquo;ISO en cons\u00e9quence.<\/p>\n\n\n\n<figure class=\"wp-block-image size-large\"><img data-recalc-dims=\"1\" loading=\"lazy\" decoding=\"async\" width=\"800\" height=\"450\" src=\"https:\/\/i0.wp.com\/pierretlambert.com\/wp-content\/uploads\/2024\/11\/comment-choisir-vitesse-obturation-photographie-fige-flou.jpg?resize=800%2C450&#038;ssl=1\" alt=\"comment choisir la vitesse d'obturation pour figer un sujet en photographie\" class=\"wp-image-8408\" srcset=\"https:\/\/i0.wp.com\/pierretlambert.com\/wp-content\/uploads\/2024\/11\/comment-choisir-vitesse-obturation-photographie-fige-flou.jpg?resize=1024%2C576&ssl=1 1024w, https:\/\/i0.wp.com\/pierretlambert.com\/wp-content\/uploads\/2024\/11\/comment-choisir-vitesse-obturation-photographie-fige-flou.jpg?resize=300%2C169&ssl=1 300w, https:\/\/i0.wp.com\/pierretlambert.com\/wp-content\/uploads\/2024\/11\/comment-choisir-vitesse-obturation-photographie-fige-flou.jpg?resize=768%2C432&ssl=1 768w, https:\/\/i0.wp.com\/pierretlambert.com\/wp-content\/uploads\/2024\/11\/comment-choisir-vitesse-obturation-photographie-fige-flou.jpg?resize=1536%2C864&ssl=1 1536w, https:\/\/i0.wp.com\/pierretlambert.com\/wp-content\/uploads\/2024\/11\/comment-choisir-vitesse-obturation-photographie-fige-flou.jpg?w=1600&ssl=1 1600w\" sizes=\"(max-width: 800px) 100vw, 800px\" \/><\/figure>\n\n\n\n<p>Les modes semi-automatiques offrent une excellente base pour progresser en photographie, et sont utilis\u00e9s au quotidien par la majorit\u00e9 des photographes professionnels. Ils permettent de se concentrer sur la composition et la cr\u00e9ativit\u00e9 tout en laissant l&rsquo;appareil g\u00e9rer les r\u00e9glages techniques. En les utilisant, tu pourras exprimer ta cr\u00e9ativit\u00e9 et prendre des photos qui te ressemblent. Imagine les possibilit\u00e9s qui s&rsquo;offrent \u00e0 toi : c&rsquo;est le d\u00e9but d&rsquo;une nouvelle aventure photographique !<\/p>\n\n\n\n<p>Et pour passer au niveau sup\u00e9rieur dans ton parcours photographique, je t\u2019invite \u00e0 lire mes autres articles sur la photographie, ou \u00e0 t\u2019inscrire \u00e0 ma formation <a href=\"https:\/\/pierretlambert.com\/fr\/30dcourse\/\">30 jours pour des photos pro<\/a>. Je serai l\u00e0 pour t\u2019accompagner dans ta progression et r\u00e9pondre \u00e0 toutes tes questions.<\/p>\n\n\n\n<p>N&rsquo;oublie pas, la photographie est avant tout un plaisir ! Alors, amuse-toi, exp\u00e9rimente et laisse ta cr\u00e9ativit\u00e9 s&rsquo;exprimer.<\/p>\n","protected":false},"excerpt":{"rendered":"<p>La photographie, c&rsquo;est l&rsquo;art de capturer et de modeler la lumi\u00e8re pour cr\u00e9er des images uniques. Chaque clich\u00e9 repose sur un \u00e9l\u00e9ment cl\u00e9 : la quantit\u00e9 de lumi\u00e8re qui atteint le capteur de l\u2019appareil photo. Pour contr\u00f4ler cette lumi\u00e8re, trois r\u00e9glages fondamentaux entrent en jeu : l\u2019ouverture du diaphragme, la vitesse d\u2019obturation, et la sensibilit\u00e9 [&hellip;]<\/p>\n","protected":false},"author":1,"featured_media":8367,"comment_status":"open","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"_acf_changed":false,"_jetpack_newsletter_access":"","_jetpack_dont_email_post_to_subs":true,"_jetpack_newsletter_tier_id":0,"_jetpack_memberships_contains_paywalled_content":false,"_jetpack_memberships_contains_paid_content":false,"footnotes":"","jetpack_post_was_ever_published":false},"categories":[172],"tags":[],"class_list":["post-8366","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-photographie"],"acf":[],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v28.2 - https:\/\/yoast.com\/product\/yoast-seo-wordpress\/ -->\n<title>Les bases de la photographie : guide simple pour d\u00e9butants<\/title>\n<meta name=\"description\" content=\"Apprenez les bases de la photographie : triangle d\u2019exposition, ouverture, vitesse et ISO. Des astuces simples pour r\u00e9ussir vos photos comme un pro.\" \/>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"https:\/\/pierretlambert.com\/fr\/bases-photographie-ouverture-vitesse-iso\/\" \/>\n<meta property=\"og:locale\" content=\"fr_FR\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"Les bases de la photographie : guide simple pour d\u00e9butants\" \/>\n<meta property=\"og:description\" content=\"Apprenez les bases de la photographie : triangle d\u2019exposition, ouverture, vitesse et ISO. Des astuces simples pour r\u00e9ussir vos photos comme un pro.\" \/>\n<meta property=\"og:url\" content=\"https:\/\/pierretlambert.com\/fr\/bases-photographie-ouverture-vitesse-iso\/\" \/>\n<meta property=\"og:site_name\" content=\"Pierre T. 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