{"id":1998,"date":"2014-07-20T12:22:23","date_gmt":"2014-07-20T11:22:23","guid":{"rendered":"http:\/\/www.visionlarge.ch\/Blog\/?p=1998"},"modified":"2026-01-18T11:35:46","modified_gmt":"2026-01-18T10:35:46","slug":"reciprocite-films-argentiques","status":"publish","type":"post","link":"https:\/\/www.visionlarge.ch\/Blog\/reciprocite-films-argentiques\/","title":{"rendered":"R\u00e9ciprocit\u00e9 des films argentiques"},"content":{"rendered":"\n<h2 class=\"wp-block-heading\"><strong>La loi de la r\u00e9ciprocit\u00e9 des films argentiques.<\/strong><\/h2>\n\n\n\n<p class=\"has-text-align-center wp-block-paragraph\">Mais qu&rsquo;est ce que c&rsquo;est ce machin? La loi de la r\u00e9ciprocit\u00e9 c&rsquo;est la facult\u00e9 qu&rsquo;\u00e0 un film \u00e0 avoir une exposition juste selon le temps d&rsquo;exposition.<\/p>\n\n\n\n<p class=\"has-text-align-center wp-block-paragraph\">J&rsquo;explique,&nbsp;l&rsquo;exposition d&rsquo;un film et sa r\u00e9action n&rsquo;est pas lin\u00e9aire. Le film subit une sorte de perte de contraste selon le temps d&rsquo;exposition. Plus le temps est long, plus le film devient mou, ou sous expos\u00e9.<\/p>\n\n\n\n<p class=\"has-text-align-center wp-block-paragraph\">Afin, de pouvoir contrer ce probl\u00e8me, les prospectus des films ont souvent un diagramme de la courbe de r\u00e9ciprocit\u00e9. Cette courbe est importante lors des poses longues. Personnellement, je ne pense pas qu&rsquo;il faille corriger pour les temps de pose inf\u00e9rieur \u00e0 1s.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><em><strong>J&rsquo;ai essay\u00e9 de mettre mes tableaux en responsive, il devrait afficher plus petit les caract\u00e8res sur smartphone et si le tableau est toujours trop gros, vous devriez pouvoir scroller horizontalement&#8230;.<\/strong><\/em><\/p>\n\n\n\n<p class=\"has-text-align-center wp-block-paragraph\"><strong>Pour la <a title=\"Kodak Tmax400 2, un film performant!\" href=\"http:\/\/www.visionlarge.ch\/Blog\/kodak-tmax400-film-performant\/\">Tmax400<\/a>, voici le tableau de r\u00e9ciprocit\u00e9.<\/strong><\/p>\n\n\n\n<style>\n  .table-responsive {\n    overflow-x: auto;\n  }\n  table {\n    width: 100%;\n    border-collapse: collapse;\n    font-size: 14px;\n  }\n  th, td {\n    border: 1px solid #ccc;\n    padding: 8px;\n    text-align: left;\n  }\n  thead {\n    background-color: #f2f2f2;\n  }\n  @media (max-width: 480px) {\n    table {\n      font-size: 10px;\n    }\n  }\n<\/style>\n\n<div class=\"table-responsive\">\n  <table>\n    <thead>\n      <tr>\n        <th>If Indicated Exposure Time Is (Seconds)<\/th>\n        <th>Use This Lens-Aperture OR Adjustment<\/th>\n        <th>This Adjusted Exposure Time (Seconds)<\/th>\n      <\/tr>\n    <\/thead>\n    <tbody>\n      <tr><td>1\/10,000<\/td><td>None<\/td><td>None<\/td><\/tr>\n      <tr><td>1\/1,000<\/td><td>None<\/td><td>None<\/td><\/tr>\n      <tr><td>1\/100<\/td><td>None<\/td><td>None<\/td><\/tr>\n      <tr><td>1\/10<\/td><td>None<\/td><td>None<\/td><\/tr>\n      <tr><td>1<\/td><td>None<\/td><td>None<\/td><\/tr>\n      <tr><td>10<\/td><td>+1\/3 stop<\/td><td>Change Aperture<\/td><\/tr>\n      <tr><td>100<\/td><td>+1 1\/2 stops<\/td><td>300<\/td><\/tr>\n    <\/tbody>\n  <\/table>\n<\/div>\n\n\n\n<p class=\"has-text-align-center wp-block-paragraph\">Pour les temps de 10 secondes ont voit qu&rsquo;il faut rajouter un 1\/3 de diaph. Mais pour 100 secondes c&rsquo;est jusqu&rsquo;\u00e0 3x le temps d&rsquo;expo!<\/p>\n\n\n\n<p class=\"has-text-align-center wp-block-paragraph\">J&rsquo;ai pu tester la <a title=\"Kodak Tmax400 2, un film performant!\" href=\"http:\/\/www.visionlarge.ch\/Blog\/kodak-tmax400-film-performant\/\">Tmax 400<\/a> est pour un temps de 67 secondes, perso, j&rsquo;ai pu remarqu\u00e9 un d\u00e9faut de 1 diaph.<\/p>\n\n\n\n<p class=\"has-text-align-center wp-block-paragraph\"><strong>Pour la Kodak Ektar 100<\/strong>. <\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Je n&rsquo;ai pas vraiment remarqu\u00e9 de d\u00e9rive de contraste. Je crois que c&rsquo;est souvent le cas pour les films couleurs. J&rsquo;ai eu fait jusqu&rsquo;\u00e0 30-40 secondes. Et cela allait. Par contre, sur le net, on entend (lit), que depuis un minutes, quelques d\u00e9rives de couleurs peuvent survenir.<\/p>\n\n\n\n<p class=\"has-text-align-center wp-block-paragraph\"><strong>Pour la Kodak Portra 400<\/strong><\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Comme l&rsquo;Ektar 100 en dessous de 15s. Je n&rsquo;ai pas vu de diff\u00e9rence. Et d&rsquo;ailleurs comme l&rsquo;Ektar, sur la <a href=\"https:\/\/imaging.kodakalaris.com\/sites\/prod\/files\/files\/products\/e4050_portra_400.pdf\">fiche technique de la Portra 400<\/a>, il y&rsquo;a m\u00eame pas de tableau sur la r\u00e9ciprocit\u00e9. Du coup, je suppose qu&rsquo;il n&rsquo;y a pas \u00e0 corriger. Comme la pr\u00e9c\u00e9dente, apr\u00e8s de tr\u00e8s longues secondes, il se pourrait qu&rsquo;il y aie des d\u00e9rives de couleurs&#8230; Mais c&rsquo;est vraiment de la supposition.<\/p>\n\n\n\n<p class=\"has-text-align-center wp-block-paragraph\"><strong>Idem pour l&rsquo;UltraMax 400<\/strong>, <\/p>\n\n\n\n<p class=\"wp-block-paragraph\">qui dans sa <a href=\"https:\/\/apps.kodakmoments.com\/wp-content\/uploads\/2017\/07\/E7023_max_400.pdf\">fiche technique<\/a> ne poss\u00e8de pas de tableau de r\u00e9ciprocit\u00e9.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Penser \u00e0 corriger vos expos \ud83d\ude09 ! Ce serait vraiment dommage de rentrer avec un film un peu lav\u00e9 et sous ex.<\/p>\n\n\n\n<p class=\"has-text-align-center wp-block-paragraph\"><strong>Pour la Tmax 100<\/strong><\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Pour la Tmax 100, on voit qu&rsquo;il est n\u00e9cessaire de jouer sur le temps \u00e0 partir de 1s. Tableau de la documentions technique de la Kodak Tmax 100<\/p>\n\n\n\n<style>\n  .table-responsive {\n    overflow-x: auto;\n  }\n  table.has-fixed-layout {\n    width: 100%;\n    border-collapse: collapse;\n    font-size: 14px;\n  }\n  table.has-fixed-layout th,\n  table.has-fixed-layout td {\n    border: 1px solid #ccc;\n    padding: 8px;\n    text-align: left;\n  }\n  table.has-fixed-layout thead {\n    background-color: #f2f2f2;\n  }\n  @media (max-width: 480px) {\n    table.has-fixed-layout {\n      font-size: 10px !important;\n    }\n  }\n<\/style>\n\n<div class=\"table-responsive\">\n  <figure class=\"wp-block-table\">\n    <table class=\"has-fixed-layout\">\n      <thead>\n        <tr>\n          <th>If Indicated Exposure Time Is (Seconds)<\/th>\n          <th>Use This Lens-Aperture OR Adjustment<\/th>\n          <th>This Adjusted Exposure Time (Seconds)<\/th>\n        <\/tr>\n      <\/thead>\n      <tbody>\n        <tr><td>1\/10,000<\/td><td>+1\/3 stop<br \/>Change Aperture<\/td><td><\/td><\/tr>\n        <tr><td>1\/1,000<\/td><td>None<\/td><td>None<\/td><\/tr>\n        <tr><td>1\/100<\/td><td>None<\/td><td>None<\/td><\/tr>\n        <tr><td>1\/10<\/td><td>None<\/td><td>None<\/td><\/tr>\n        <tr><td>1<\/td><td>+1\/3 stop<br \/>Change Aperture<\/td><td><\/td><\/tr>\n        <tr><td>10<\/td><td>+1\/2 stop<\/td><td>15<\/td><\/tr>\n        <tr><td>100<\/td><td>+1 stop<\/td><td>200<\/td><\/tr>\n      <\/tbody>\n    <\/table>\n  <\/figure>\n<\/div>\n\n\n\n<p class=\"has-text-align-center wp-block-paragraph\"><strong>Pour la Trix 400<\/strong><\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Pour la Trix400, on voit qu&rsquo;il est n\u00e9cessaire de jouer sur le temps \u00e0 partir de 1s. Tableau de la documentions technique de la Kodak Trix 400. Bon on est d&rsquo;accord&#8230; Personne n&rsquo;a des appareils qui exposent au 1\/10000 ou 1\/100000 \ud83d\ude42<\/p>\n\n\n\n<style>\n  .table-responsive {\n    overflow-x: auto;\n  }\n  table.has-fixed-layout {\n    width: 100%;\n    border-collapse: collapse;\n    font-size: 14px;\n  }\n  table.has-fixed-layout th,\n  table.has-fixed-layout td {\n    border: 1px solid #ccc;\n    padding: 8px;\n    text-align: left;\n  }\n  table.has-fixed-layout thead {\n    background-color: #f2f2f2;\n  }\n  @media (max-width: 480px) {\n    table.has-fixed-layout {\n      font-size: 10px !important;\n    }\n  }\n<\/style>\n\n<div class=\"table-responsive\">\n  <figure class=\"wp-block-table\">\n    <table class=\"has-fixed-layout\">\n      <thead>\n        <tr>\n          <th>If Indicated Exposure Time Is (Seconds)<\/th>\n          <th>Use This Lens-Aperture Adjustment OR This Adjusted Exposure Time (Seconds)<\/th>\n          <th>AND Use This Development Adjustment<\/th>\n        <\/tr>\n      <\/thead>\n      <tbody>\n        <tr><td>1\/100,000<\/td><td>+1 stop Change Aperture<\/td><td>+20%<\/td><\/tr>\n        <tr><td>1\/10,000<\/td><td>+1\/2 stop Change Aperture<\/td><td>+15%<\/td><\/tr>\n        <tr><td>1\/1,000<\/td><td>None<\/td><td>+10%<\/td><\/tr>\n        <tr><td>1\/100<\/td><td>None<\/td><td>None<\/td><\/tr>\n        <tr><td>1\/10<\/td><td>None<\/td><td>None<\/td><\/tr>\n        <tr><td>1<\/td><td>+1 stop 2<\/td><td>-10%<\/td><\/tr>\n        <tr><td>10<\/td><td>+2 stops 50<\/td><td>-20%<\/td><\/tr>\n        <tr><td>100<\/td><td>+3 stops 1200<\/td><td>-30%<\/td><\/tr>\n      <\/tbody>\n    <\/table>\n  <\/figure>\n<\/div>\n\n\n\n<p class=\"has-text-align-center wp-block-paragraph\"><strong>Pour les films Ilford,<\/strong><\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Pour les films Ilford, il n&rsquo;y a pas de tableau. Mais une conversion \u00e0 faire. Il suffit de multiplier par le facteur par exemple pour la FP4+ c&rsquo;est 1.26. Donc si votre expo demande 10s: 10 exposant 1.26 = 18.2s. Je trouve leur syst\u00e8me compliqu\u00e9. Reste que l&rsquo;on peut faire une moyenne pour tous les films. En utilisant l&rsquo;exposant 1.3&#8230;<\/p>\n\n\n\n<style>\n  .table-responsive {\n    overflow-x: auto;\n  }\n  table.has-fixed-layout {\n    width: 100%;\n    border-collapse: collapse;\n    font-size: 14px;\n  }\n  table.has-fixed-layout th,\n  table.has-fixed-layout td {\n    border: 1px solid #ccc;\n    padding: 8px;\n    text-align: left;\n  }\n  table.has-fixed-layout thead {\n    background-color: #f2f2f2;\n  }\n  @media (max-width: 480px) {\n    table.has-fixed-layout {\n      font-size: 10px !important;\n    }\n  }\n<\/style>\n\n<div class=\"table-responsive\">\n  <figure class=\"wp-block-table\">\n    <table class=\"has-fixed-layout\">\n      <thead>\n        <tr>\n          <th>Film<\/th>\n          <th>Valeur<\/th>\n        <\/tr>\n      <\/thead>\n      <tbody>\n        <tr><td>SFX<\/td><td>1.43<\/td><\/tr>\n        <tr><td>Pan F+<\/td><td>1.33<\/td><\/tr>\n        <tr><td>D100<\/td><td>1.26<\/td><\/tr>\n        <tr><td>D400<\/td><td>1.41<\/td><\/tr>\n        <tr><td>D3200<\/td><td>1.33<\/td><\/tr>\n        <tr><td>FP4+<\/td><td>1.26<\/td><\/tr>\n        <tr><td>HP5+<\/td><td>1.31<\/td><\/tr>\n        <tr><td>XP2<\/td><td>1.31<\/td><\/tr>\n        <tr><td>Ortho+<\/td><td>1.25<\/td><\/tr>\n        <tr><td>K100<\/td><td>1.26<\/td><\/tr>\n        <tr><td>K400<\/td><td>1.30<\/td><\/tr>\n      <\/tbody>\n    <\/table>\n  <\/figure>\n<\/div>\n\n\n\n<p class=\"wp-block-paragraph\">Franchement c&rsquo;est abus\u00e9 chez Ilford! Du coup, pour une moyenne de 1.3 (apr\u00e8s vous faites ce que vous voulez&#8230;.) voici le graphique au lieu de regarder dans les tableau.<\/p>\n\n\n\n<figure class=\"wp-block-image size-full\"><img loading=\"lazy\" decoding=\"async\" width=\"1166\" height=\"436\" src=\"https:\/\/www.visionlarge.ch\/Blog\/wp-content\/uploads\/image.png\" alt=\"\" class=\"wp-image-9529\" srcset=\"https:\/\/www.visionlarge.ch\/Blog\/wp-content\/uploads\/image.png 1166w, https:\/\/www.visionlarge.ch\/Blog\/wp-content\/uploads\/image-300x112.png 300w, https:\/\/www.visionlarge.ch\/Blog\/wp-content\/uploads\/image-150x56.png 150w, https:\/\/www.visionlarge.ch\/Blog\/wp-content\/uploads\/image-768x287.png 768w\" sizes=\"auto, (max-width: 1166px) 100vw, 1166px\" \/><\/figure>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>Pour Ortho + et D100, FP4+, K100<\/strong><\/p>\n\n\n\n<style>\n  .table-responsive {\n    overflow-x: auto;\n  }\n  table.has-fixed-layout {\n    width: 100%;\n    border-collapse: collapse;\n    font-size: 14px;\n  }\n  table.has-fixed-layout th,\n  table.has-fixed-layout td {\n    border: 1px solid #ccc;\n    padding: 8px;\n    text-align: right; \/* tu peux ajuster selon ton besoin *\/\n  }\n  table.has-fixed-layout thead {\n    background-color: #f2f2f2;\n  }\n  @media (max-width: 480px) {\n    table.has-fixed-layout {\n      font-size: 10px !important;\n    }\n  }\n<\/style>\n\n<div class=\"table-responsive\">\n  <figure class=\"wp-block-table\">\n    <table class=\"has-fixed-layout\">\n      <thead>\n        <tr>\n          <th>S<\/th>\n          <th>Xy<\/th>\n          <th>S r\u00e9ciprocit\u00e9<\/th>\n          <th><\/th>\n          <th>S<\/th>\n          <th>Xy<\/th>\n          <th>S r\u00e9ciprocit\u00e9<\/th>\n        <\/tr>\n      <\/thead>\n      <tbody>\n        <tr><td>1<\/td><td>1,25<\/td><td>1,00<\/td><td><\/td><td>1<\/td><td>1,26<\/td><td>1,00<\/td><\/tr>\n        <tr><td>2<\/td><td>1,25<\/td><td>2,38<\/td><td><\/td><td>2<\/td><td>1,26<\/td><td>2,39<\/td><\/tr>\n        <tr><td>3<\/td><td>1,25<\/td><td>3,95<\/td><td><\/td><td>3<\/td><td>1,26<\/td><td>3,99<\/td><\/tr>\n        <tr><td>4<\/td><td>1,25<\/td><td>5,66<\/td><td><\/td><td>4<\/td><td>1,26<\/td><td>5,74<\/td><\/tr>\n        <tr><td>5<\/td><td>1,25<\/td><td>7,48<\/td><td><\/td><td>5<\/td><td>1,26<\/td><td>7,60<\/td><\/tr>\n        <tr><td>6<\/td><td>1,25<\/td><td>9,39<\/td><td><\/td><td>6<\/td><td>1,26<\/td><td>9,56<\/td><\/tr>\n        <tr><td>7<\/td><td>1,25<\/td><td>11,39<\/td><td><\/td><td>7<\/td><td>1,26<\/td><td>11,61<\/td><\/tr>\n        <tr><td>8<\/td><td>1,25<\/td><td>13,45<\/td><td><\/td><td>8<\/td><td>1,26<\/td><td>13,74<\/td><\/tr>\n        <tr><td>9<\/td><td>1,25<\/td><td>15,59<\/td><td><\/td><td>9<\/td><td>1,26<\/td><td>15,93<\/td><\/tr>\n        <tr><td>10<\/td><td>1,25<\/td><td>17,78<\/td><td><\/td><td>10<\/td><td>1,26<\/td><td>18,20<\/td><\/tr>\n        <tr><td>11<\/td><td>1,25<\/td><td>20,03<\/td><td><\/td><td>11<\/td><td>1,26<\/td><td>20,52<\/td><\/tr>\n        <tr><td>12<\/td><td>1,25<\/td><td>22,33<\/td><td><\/td><td>12<\/td><td>1,26<\/td><td>22,90<\/td><\/tr>\n        <tr><td>13<\/td><td>1,25<\/td><td>24,68<\/td><td><\/td><td>13<\/td><td>1,26<\/td><td>25,33<\/td><\/tr>\n        <tr><td>14<\/td><td>1,25<\/td><td>27,08<\/td><td><\/td><td>14<\/td><td>1,26<\/td><td>27,80<\/td><\/tr>\n        <tr><td>15<\/td><td>1,25<\/td><td>29,52<\/td><td><\/td><td>15<\/td><td>1,26<\/td><td>30,33<\/td><\/tr>\n        <tr><td>16<\/td><td>1,25<\/td><td>32,00<\/td><td><\/td><td>16<\/td><td>1,26<\/td><td>32,90<\/td><\/tr>\n        <tr><td>17<\/td><td>1,25<\/td><td>34,52<\/td><td><\/td><td>17<\/td><td>1,26<\/td><td>35,51<\/td><\/tr>\n        <tr><td>18<\/td><td>1,25<\/td><td>37,08<\/td><td><\/td><td>18<\/td><td>1,26<\/td><td>38,16<\/td><\/tr>\n        <tr><td>19<\/td><td>1,25<\/td><td>39,67<\/td><td><\/td><td>19<\/td><td>1,26<\/td><td>40,85<\/td><\/tr>\n        <tr><td>20<\/td><td>1,25<\/td><td>42,29<\/td><td><\/td><td>20<\/td><td>1,26<\/td><td>43,58<\/td><\/tr>\n      <\/tbody>\n    <\/table>\n  <\/figure>\n<\/div>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>pour K400, Hp2, Hp5<\/strong><\/p>\n\n\n\n<style>\n  .table-responsive {\n    overflow-x: auto;\n  }\n  table.has-fixed-layout {\n    width: 100%;\n    border-collapse: collapse;\n    font-size: 14px;\n  }\n  table.has-fixed-layout th,\n  table.has-fixed-layout td {\n    border: 1px solid #ccc;\n    padding: 8px;\n    text-align: right;\n  }\n  table.has-fixed-layout thead {\n    background-color: #f2f2f2;\n  }\n  \/* Police plus petite sur smartphone *\/\n  @media (max-width: 480px) {\n    table.has-fixed-layout {\n      font-size: 10px !important;\n    }\n  }\n  \/* Garder le gras dans la premi\u00e8re moiti\u00e9 des colonnes *\/\n  table.has-fixed-layout tbody tr td:first-child,\n  table.has-fixed-layout tbody tr td:nth-child(2),\n  table.has-fixed-layout tbody tr td:nth-child(3) {\n    font-weight: bold;\n  }\n<\/style>\n\n<div class=\"table-responsive\">\n  <figure class=\"wp-block-table\">\n    <table class=\"has-fixed-layout\">\n      <thead>\n        <tr>\n          <th>S<\/th>\n          <th>Xy<\/th>\n          <th>S r\u00e9ciprocit\u00e9<\/th>\n          <th><\/th>\n          <th>S<\/th>\n          <th>Xy<\/th>\n          <th>S r\u00e9ciprocit\u00e9<\/th>\n        <\/tr>\n      <\/thead>\n      <tbody>\n        <tr><td>1<\/td><td>1,30<\/td><td>1,00<\/td><td><\/td><td>1<\/td><td>1,31<\/td><td>1,00<\/td><\/tr>\n        <tr><td>2<\/td><td>1,30<\/td><td>2,46<\/td><td><\/td><td>2<\/td><td>1,31<\/td><td>2,48<\/td><\/tr>\n        <tr><td>3<\/td><td>1,30<\/td><td>4,17<\/td><td><\/td><td>3<\/td><td>1,31<\/td><td>4,22<\/td><\/tr>\n        <tr><td>4<\/td><td>1,30<\/td><td>6,06<\/td><td><\/td><td>4<\/td><td>1,31<\/td><td>6,15<\/td><\/tr>\n        <tr><td>5<\/td><td>1,30<\/td><td>8,10<\/td><td><\/td><td>5<\/td><td>1,31<\/td><td>8,23<\/td><\/tr>\n        <tr><td>6<\/td><td>1,30<\/td><td>10,27<\/td><td><\/td><td>6<\/td><td>1,31<\/td><td>10,46<\/td><\/tr>\n        <tr><td>7<\/td><td>1,30<\/td><td>12,55<\/td><td><\/td><td>7<\/td><td>1,31<\/td><td>12,80<\/td><\/tr>\n        <tr><td>8<\/td><td>1,30<\/td><td>14,93<\/td><td><\/td><td>8<\/td><td>1,31<\/td><td>15,24<\/td><\/tr>\n        <tr><td>9<\/td><td>1,30<\/td><td>17,40<\/td><td><\/td><td>9<\/td><td>1,31<\/td><td>17,79<\/td><\/tr>\n        <tr><td>10<\/td><td>1,30<\/td><td>19,95<\/td><td><\/td><td>10<\/td><td>1,31<\/td><td>20,42<\/td><\/tr>\n        <tr><td>11<\/td><td>1,30<\/td><td>22,58<\/td><td><\/td><td>11<\/td><td>1,31<\/td><td>23,13<\/td><\/tr>\n        <tr><td>12<\/td><td>1,30<\/td><td>25,29<\/td><td><\/td><td>12<\/td><td>1,31<\/td><td>25,93<\/td><\/tr>\n        <tr><td>13<\/td><td>1,30<\/td><td>28,06<\/td><td><\/td><td>13<\/td><td>1,31<\/td><td>28,79<\/td><\/tr>\n        <tr><td>14<\/td><td>1,30<\/td><td>30,90<\/td><td><\/td><td>14<\/td><td>1,31<\/td><td>31,73<\/td><\/tr>\n        <tr><td>15<\/td><td>1,30<\/td><td>33,80<\/td><td><\/td><td>15<\/td><td>1,31<\/td><td>34,73<\/td><\/tr>\n        <tr><td>16<\/td><td>1,30<\/td><td>36,76<\/td><td><\/td><td>16<\/td><td>1,31<\/td><td>37,79<\/td><\/tr>\n        <tr><td>17<\/td><td>1,30<\/td><td>39,77<\/td><td><\/td><td>17<\/td><td>1,31<\/td><td>40,92<\/td><\/tr>\n        <tr><td>18<\/td><td>1,30<\/td><td>42,84<\/td><td><\/td><td>18<\/td><td>1,31<\/td><td>44,10<\/td><\/tr>\n        <tr><td>19<\/td><td>1,30<\/td><td>45,96<\/td><td><\/td><td>19<\/td><td>1,31<\/td><td>47,33<\/td><\/tr>\n        <tr><td>20<\/td><td>1,30<\/td><td>49,13<\/td><td><\/td><td>20<\/td><td>1,31<\/td><td>50,62<\/td><\/tr>\n      <\/tbody>\n    <\/table>\n  <\/figure>\n<\/div>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>Pour PanF, D3200 et D400<\/strong><\/p>\n\n\n\n<style>\n  .table-responsive {\n    overflow-x: auto;\n  }\n  table.has-fixed-layout {\n    width: 100%;\n    border-collapse: collapse;\n    font-size: 14px;\n  }\n  table.has-fixed-layout th,\n  table.has-fixed-layout td {\n    border: 1px solid #ccc;\n    padding: 8px;\n    text-align: right;\n  }\n  table.has-fixed-layout thead {\n    background-color: #f2f2f2;\n  }\n  \/* Police plus petite sur smartphone *\/\n  @media (max-width: 480px) {\n    table.has-fixed-layout {\n      font-size: 10px !important;\n    }\n  }\n  \/* Mettre en gras la premi\u00e8re moiti\u00e9 des colonnes (3 premi\u00e8res colonnes) *\/\n  table.has-fixed-layout tbody tr td:nth-child(-n+3) {\n    font-weight: bold;\n  }\n<\/style>\n\n<div class=\"table-responsive\">\n  <figure class=\"wp-block-table\">\n    <table class=\"has-fixed-layout\">\n      <thead>\n        <tr>\n          <th>S<\/th>\n          <th>Xy<\/th>\n          <th>S r\u00e9ciprocit\u00e9<\/th>\n          <th><\/th>\n          <th>S<\/th>\n          <th>Xy<\/th>\n          <th>S r\u00e9ciprocit\u00e9<\/th>\n        <\/tr>\n      <\/thead>\n      <tbody>\n        <tr><td>1<\/td><td>1,33<\/td><td>1,00<\/td><td><\/td><td>1<\/td><td>1,41<\/td><td>1,00<\/td><\/tr>\n        <tr><td>2<\/td><td>1,33<\/td><td>2,51<\/td><td><\/td><td>2<\/td><td>1,41<\/td><td>2,66<\/td><\/tr>\n        <tr><td>3<\/td><td>1,33<\/td><td>4,31<\/td><td><\/td><td>3<\/td><td>1,41<\/td><td>4,71<\/td><\/tr>\n        <tr><td>4<\/td><td>1,33<\/td><td>6,32<\/td><td><\/td><td>4<\/td><td>1,41<\/td><td>7,06<\/td><\/tr>\n        <tr><td>5<\/td><td>1,33<\/td><td>8,50<\/td><td><\/td><td>5<\/td><td>1,41<\/td><td>9,67<\/td><\/tr>\n        <tr><td>6<\/td><td>1,33<\/td><td>10,84<\/td><td><\/td><td>6<\/td><td>1,41<\/td><td>12,51<\/td><\/tr>\n        <tr><td>7<\/td><td>1,33<\/td><td>13,30<\/td><td><\/td><td>7<\/td><td>1,41<\/td><td>15,54<\/td><\/tr>\n        <tr><td>8<\/td><td>1,33<\/td><td>15,89<\/td><td><\/td><td>8<\/td><td>1,41<\/td><td>18,77<\/td><\/tr>\n        <tr><td>9<\/td><td>1,33<\/td><td>18,58<\/td><td><\/td><td>9<\/td><td>1,41<\/td><td>22,16<\/td><\/tr>\n        <tr><td>10<\/td><td>1,33<\/td><td>21,38<\/td><td><\/td><td>10<\/td><td>1,41<\/td><td>25,70<\/td><\/tr>\n        <tr><td>11<\/td><td>1,33<\/td><td>24,27<\/td><td><\/td><td>11<\/td><td>1,41<\/td><td>29,40<\/td><\/tr>\n        <tr><td>12<\/td><td>1,33<\/td><td>27,25<\/td><td><\/td><td>12<\/td><td>1,41<\/td><td>33,24<\/td><\/tr>\n        <tr><td>13<\/td><td>1,33<\/td><td>30,31<\/td><td><\/td><td>13<\/td><td>1,41<\/td><td>37,21<\/td><\/tr>\n        <tr><td>14<\/td><td>1,33<\/td><td>33,45<\/td><td><\/td><td>14<\/td><td>1,41<\/td><td>41,31<\/td><\/tr>\n        <tr><td>15<\/td><td>1,33<\/td><td>36,66<\/td><td><\/td><td>15<\/td><td>1,41<\/td><td>45,53<\/td><\/tr>\n        <tr><td>16<\/td><td>1,33<\/td><td>39,95<\/td><td><\/td><td>16<\/td><td>1,41<\/td><td>49,87<\/td><\/tr>\n        <tr><td>17<\/td><td>1,33<\/td><td>43,30<\/td><td><\/td><td>17<\/td><td>1,41<\/td><td>54,32<\/td><\/tr>\n        <tr><td>18<\/td><td>1,33<\/td><td>46,72<\/td><td><\/td><td>18<\/td><td>1,41<\/td><td>58,88<\/td><\/tr>\n        <tr><td>19<\/td><td>1,33<\/td><td>50,20<\/td><td><\/td><td>19<\/td><td>1,41<\/td><td>63,54<\/td><\/tr>\n        <tr><td>20<\/td><td>1,33<\/td><td>53,75<\/td><td><\/td><td>20<\/td><td>1,41<\/td><td>68,30<\/td><\/tr>\n      <\/tbody>\n    <\/table>\n  <\/figure>\n<\/div>\n\n\n\n<p class=\"wp-block-paragraph\"><\/p>\n","protected":false},"excerpt":{"rendered":"<p>La loi de la r\u00e9ciprocit\u00e9 des films argentiques. Mais qu&rsquo;est ce que c&rsquo;est ce machin? La loi de la r\u00e9ciprocit\u00e9 c&rsquo;est la facult\u00e9 qu&rsquo;\u00e0 un film \u00e0 avoir une exposition juste selon le temps d&rsquo;exposition. J&rsquo;explique,&nbsp;l&rsquo;exposition d&rsquo;un film et sa r\u00e9action n&rsquo;est pas lin\u00e9aire. Le film subit une sorte de&#8230;<\/p>\n<div class=\"more-link-wrapper\"><a class=\"more-link\" href=\"https:\/\/www.visionlarge.ch\/Blog\/reciprocite-films-argentiques\/\">La suite? C&#039;est par l\u00e0!<span class=\"screen-reader-text\">R\u00e9ciprocit\u00e9 des films argentiques<\/span><\/a><\/div>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[157],"tags":[90,1104,1102,1103],"class_list":["post-1998","post","type-post","status-publish","format-standard","hentry","category-test-film-et-dev","tag-halogenures","tag-panf-reciprocity","tag-reciprocite-de-films-argentique","tag-reciprocite-des-films","excerpt","zoom","full-without-featured","even","excerpt-0"],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v27.6 - https:\/\/yoast.com\/product\/yoast-seo-wordpress\/ -->\n<title>La loi de la r\u00e9ciprocit\u00e9 des films argentiques<\/title>\n<meta name=\"description\" content=\"La loi de la r\u00e9ciprocit\u00e9 des films argentiques. Il est important de conna\u00eetre cette petite r\u00e8gle pour \u00e9viter les mauvaises surprises.\" \/>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"https:\/\/www.visionlarge.ch\/Blog\/reciprocite-films-argentiques\/\" \/>\n<meta property=\"og:locale\" content=\"fr_FR\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"La loi de la r\u00e9ciprocit\u00e9 des films argentiques\" \/>\n<meta property=\"og:url\" content=\"https:\/\/www.visionlarge.ch\/Blog\/reciprocite-films-argentiques\/\" \/>\n<meta property=\"og:site_name\" content=\"Visionlarge.ch\" \/>\n<meta property=\"article:published_time\" content=\"2014-07-20T11:22:23+00:00\" \/>\n<meta property=\"article:modified_time\" content=\"2026-01-18T10:35:46+00:00\" \/>\n<meta property=\"og:image\" content=\"https:\/\/www.visionlarge.ch\/Blog\/wp-content\/uploads\/image.png\" \/>\n\t<meta property=\"og:image:width\" content=\"1166\" \/>\n\t<meta property=\"og:image:height\" content=\"436\" \/>\n\t<meta property=\"og:image:type\" content=\"image\/png\" \/>\n<meta name=\"author\" content=\"Visionlarge\" \/>\n<meta name=\"twitter:card\" content=\"summary_large_image\" \/>\n<meta name=\"twitter:creator\" content=\"@visionlarge\" \/>\n<meta name=\"twitter:site\" content=\"@visionlarge\" \/>\n<meta name=\"twitter:label1\" content=\"\u00c9crit par\" \/>\n\t<meta name=\"twitter:data1\" content=\"Visionlarge\" \/>\n\t<meta name=\"twitter:label2\" content=\"Dur\u00e9e de lecture estim\u00e9e\" \/>\n\t<meta name=\"twitter:data2\" content=\"6 minutes\" \/>\n<script type=\"application\/ld+json\" class=\"yoast-schema-graph\">{\"@context\":\"https:\\\/\\\/schema.org\",\"@graph\":[{\"@type\":\"Article\",\"@id\":\"https:\\\/\\\/www.visionlarge.ch\\\/Blog\\\/reciprocite-films-argentiques\\\/#article\",\"isPartOf\":{\"@id\":\"https:\\\/\\\/www.visionlarge.ch\\\/Blog\\\/reciprocite-films-argentiques\\\/\"},\"author\":{\"name\":\"Visionlarge\",\"@id\":\"https:\\\/\\\/www.visionlarge.ch\\\/Blog\\\/#\\\/schema\\\/person\\\/b1280adcf8dd414efb101660dca80274\"},\"headline\":\"R\u00e9ciprocit\u00e9 des films argentiques\",\"datePublished\":\"2014-07-20T11:22:23+00:00\",\"dateModified\":\"2026-01-18T10:35:46+00:00\",\"mainEntityOfPage\":{\"@id\":\"https:\\\/\\\/www.visionlarge.ch\\\/Blog\\\/reciprocite-films-argentiques\\\/\"},\"wordCount\":726,\"commentCount\":1,\"publisher\":{\"@id\":\"https:\\\/\\\/www.visionlarge.ch\\\/Blog\\\/#\\\/schema\\\/person\\\/b1280adcf8dd414efb101660dca80274\"},\"image\":{\"@id\":\"https:\\\/\\\/www.visionlarge.ch\\\/Blog\\\/reciprocite-films-argentiques\\\/#primaryimage\"},\"thumbnailUrl\":\"https:\\\/\\\/www.visionlarge.ch\\\/Blog\\\/wp-content\\\/uploads\\\/image.png\",\"keywords\":[\"halogenures\",\"panF reciprocity\",\"r\u00e9ciprocit\u00e9 de films argentique\",\"r\u00e9ciprocit\u00e9 des films\"],\"articleSection\":[\"Test film et Dev\"],\"inLanguage\":\"fr-FR\",\"potentialAction\":[{\"@type\":\"CommentAction\",\"name\":\"Comment\",\"target\":[\"https:\\\/\\\/www.visionlarge.ch\\\/Blog\\\/reciprocite-films-argentiques\\\/#respond\"]}]},{\"@type\":\"WebPage\",\"@id\":\"https:\\\/\\\/www.visionlarge.ch\\\/Blog\\\/reciprocite-films-argentiques\\\/\",\"url\":\"https:\\\/\\\/www.visionlarge.ch\\\/Blog\\\/reciprocite-films-argentiques\\\/\",\"name\":\"La loi de la r\u00e9ciprocit\u00e9 des films argentiques\",\"isPartOf\":{\"@id\":\"https:\\\/\\\/www.visionlarge.ch\\\/Blog\\\/#website\"},\"primaryImageOfPage\":{\"@id\":\"https:\\\/\\\/www.visionlarge.ch\\\/Blog\\\/reciprocite-films-argentiques\\\/#primaryimage\"},\"image\":{\"@id\":\"https:\\\/\\\/www.visionlarge.ch\\\/Blog\\\/reciprocite-films-argentiques\\\/#primaryimage\"},\"thumbnailUrl\":\"https:\\\/\\\/www.visionlarge.ch\\\/Blog\\\/wp-content\\\/uploads\\\/image.png\",\"datePublished\":\"2014-07-20T11:22:23+00:00\",\"dateModified\":\"2026-01-18T10:35:46+00:00\",\"description\":\"La loi de la r\u00e9ciprocit\u00e9 des films argentiques. 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