{"id":1183,"date":"2026-10-05T11:29:38","date_gmt":"2026-10-05T09:29:38","guid":{"rendered":"https:\/\/thatdog.fr\/index.php\/filtres-optiques-cinema-mist-nd-diffusion\/"},"modified":"2026-10-05T12:02:40","modified_gmt":"2026-10-05T10:02:40","slug":"filtres-optiques-cinema-mist-nd-diffusion","status":"publish","type":"post","link":"https:\/\/thatdog.fr\/index.php\/filtres-optiques-cinema-mist-nd-diffusion\/","title":{"rendered":"Filtres optiques de cin\u00e9ma : ND, Mist, diffusion et polarisants"},"content":{"rendered":"\n[et_pb_section admin_label=\u00a0\u00bbsection\u00a0\u00bb]\n\t\t\t[et_pb_row admin_label=\u00a0\u00bbrow\u00a0\u00bb]\n\t\t\t\t[et_pb_column type=\u00a0\u00bb4_4&Prime;][et_pb_text admin_label=\u00a0\u00bbText\u00a0\u00bb]<p>Un filtre se place devant l\u2019objectif et modifie la lumi\u00e8re avant qu\u2019elle n\u2019atteigne le capteur. Certains filtres sont purement techniques (ND), d\u2019autres fa\u00e7onnent l\u2019image (diffusion). Voici les familles utilis\u00e9es sur un tournage, ce qu\u2019elles font et comment nous les choisissons.<\/p>\n<h2 class=\"wp-block-heading\">O\u00f9 se place un filtre ?<\/h2>\n<p>Sur un objectif photo, on visse le filtre \u00e0 l\u2019avant. Sur un tournage, on utilise un pare-soleil \u00e0 compendium (matte box) qui accueille des filtres rectangulaires de 4 \u00d7 5,65 pouces, 4 \u00d7 4 ou 6,6 \u00d7 6,6 pouces, interchangeables en quelques secondes et empilables. Certaines cam\u00e9ras int\u00e8grent aussi des filtres ND internes.<\/p>\n<h2 class=\"wp-block-heading\">Les filtres ND (densit\u00e9 neutre)<\/h2>\n<p>Un filtre ND r\u00e9duit la lumi\u00e8re sans changer les couleurs. En plein soleil, il permet de garder une grande ouverture pour un arri\u00e8re-plan flou, tout en respectant une vitesse d\u2019obturation proche de 1\/50 s pour 25 images par seconde, soit l\u2019obturateur \u00e0 180\u00b0.<\/p>\n<figure class=\"tdp-fig\" style=\"margin:22px 0\"><svg viewBox=\"0 0 640 250\" role=\"img\" aria-label=\"Graphique des filtres ND de 0,3 \u00e0 2,1 avec la lumi\u00e8re transmise\" xmlns=\"http:\/\/www.w3.org\/2000\/svg\" font-family=\"Inter,Helvetica,Arial,sans-serif\" style=\"width:100%;height:auto;display:block\"><rect width=\"640\" height=\"250\" fill=\"#161817\"\/><text x=\"20\" y=\"28\" font-size=\"15\" font-weight=\"700\" fill=\"#ffd400\">Filtres ND : lumi\u00e8re transmise<\/text><text x=\"620\" y=\"28\" font-size=\"12\" fill=\"#9aa09d\" text-anchor=\"end\">Densit\u00e9 \u00b7 lumi\u00e8re transmise<\/text><rect x=\"40\" y=\"70\" width=\"64\" height=\"130\" rx=\"6\" fill=\"#ffd400\"\/><text x=\"72\" y=\"62\" font-size=\"12\" font-weight=\"700\" fill=\"#f2f0eb\" text-anchor=\"middle\">50 %<\/text><text x=\"72\" y=\"218\" font-size=\"13\" font-weight=\"700\" fill=\"#f2f0eb\" text-anchor=\"middle\">ND 0.3<\/text><text x=\"72\" y=\"234\" font-size=\"11\" fill=\"#9aa09d\" text-anchor=\"middle\">1 stops<\/text><rect x=\"138\" y=\"135\" width=\"64\" height=\"65\" rx=\"6\" fill=\"#ffd400\"\/><text x=\"170\" y=\"127\" font-size=\"12\" font-weight=\"700\" fill=\"#f2f0eb\" text-anchor=\"middle\">25 %<\/text><text x=\"170\" y=\"218\" font-size=\"13\" font-weight=\"700\" fill=\"#f2f0eb\" text-anchor=\"middle\">ND 0.6<\/text><text x=\"170\" y=\"234\" font-size=\"11\" fill=\"#9aa09d\" text-anchor=\"middle\">2 stops<\/text><rect x=\"236\" y=\"167.5\" width=\"64\" height=\"32.5\" rx=\"6\" fill=\"#ffd400\"\/><text x=\"268\" y=\"159.5\" font-size=\"12\" font-weight=\"700\" fill=\"#f2f0eb\" text-anchor=\"middle\">12.5 %<\/text><text x=\"268\" y=\"218\" font-size=\"13\" font-weight=\"700\" fill=\"#f2f0eb\" text-anchor=\"middle\">ND 0.9<\/text><text x=\"268\" y=\"234\" font-size=\"11\" fill=\"#9aa09d\" text-anchor=\"middle\">3 stops<\/text><rect x=\"334\" y=\"183.75\" width=\"64\" height=\"16.25\" rx=\"6\" fill=\"#ffd400\"\/><text x=\"366\" y=\"175.75\" font-size=\"12\" font-weight=\"700\" fill=\"#f2f0eb\" text-anchor=\"middle\">6.25 %<\/text><text x=\"366\" y=\"218\" font-size=\"13\" font-weight=\"700\" fill=\"#f2f0eb\" text-anchor=\"middle\">ND 1.2<\/text><text x=\"366\" y=\"234\" font-size=\"11\" fill=\"#9aa09d\" text-anchor=\"middle\">4 stops<\/text><rect x=\"432\" y=\"195.944\" width=\"64\" height=\"4.056\" rx=\"6\" fill=\"#ffd400\"\/><text x=\"464\" y=\"187.944\" font-size=\"12\" font-weight=\"700\" fill=\"#f2f0eb\" text-anchor=\"middle\">1.56 %<\/text><text x=\"464\" y=\"218\" font-size=\"13\" font-weight=\"700\" fill=\"#f2f0eb\" text-anchor=\"middle\">ND 1.8<\/text><text x=\"464\" y=\"234\" font-size=\"11\" fill=\"#9aa09d\" text-anchor=\"middle\">6 stops<\/text><rect x=\"530\" y=\"196\" width=\"64\" height=\"4\" rx=\"6\" fill=\"#ffd400\"\/><text x=\"562\" y=\"188\" font-size=\"12\" font-weight=\"700\" fill=\"#f2f0eb\" text-anchor=\"middle\">0.78 %<\/text><text x=\"562\" y=\"218\" font-size=\"13\" font-weight=\"700\" fill=\"#f2f0eb\" text-anchor=\"middle\">ND 2.1<\/text><text x=\"562\" y=\"234\" font-size=\"11\" fill=\"#9aa09d\" text-anchor=\"middle\">7 stops<\/text><\/svg><figcaption>Chaque tranche de 0,3 de densit\u00e9 retire un diaphragme (stop) de lumi\u00e8re.<\/figcaption><\/figure>\n<ul><li><strong>ND 0.3, 0.6, 0.9 :<\/strong> 1, 2 ou 3 diaphragmes en moins, pour des journ\u00e9es couvertes ou une lumi\u00e8re mod\u00e9r\u00e9e.<\/li><li><strong>ND 1.2 et plus :<\/strong> 4 diaphragmes et au-del\u00e0, pour le plein soleil \u00e0 grande ouverture.<\/li><li><strong>IRND :<\/strong> certains capteurs sont sensibles \u00e0 l\u2019infrarouge ; avec un ND fort, les noirs peuvent virer au magenta ou au brun. Un ND IRND filtre aussi l\u2019infrarouge pour l\u2019\u00e9viter.<\/li><li><strong>ND variable :<\/strong> pratique en photo et en reportage, mais il peut cr\u00e9er des teintes ou un motif sombre en croix \u00e0 forte densit\u00e9. Nous pr\u00e9f\u00e9rons des ND fixes en tournage exigeant.<\/li><\/ul>\n<h2 class=\"wp-block-heading\">Le polarisant<\/h2>\n<p>Le filtre polarisant att\u00e9nue les reflets sur l\u2019eau, le verre ou les feuilles, assombrit un ciel bleu et ajoute de la densit\u00e9 aux couleurs. Il retire environ un diaphragme et demi \u00e0 deux. Il se r\u00e8gle en le faisant tourner, et son effet d\u00e9pend de l\u2019angle par rapport au soleil. Il est pr\u00e9cieux pour l\u2019immobilier, la mer et les vitrines.<\/p>\n<h2 class=\"wp-block-heading\">Les ND d\u00e9grad\u00e9s<\/h2>\n<p>Un ND d\u00e9grad\u00e9 est teint\u00e9 sur une moiti\u00e9 et clair sur l\u2019autre. Plac\u00e9 avec la partie sombre sur le ciel, il \u00e9quilibre l\u2019exposition d\u2019un paysage. Il existe en transition douce ou franche ; un horizon irr\u00e9gulier (arbres, b\u00e2timents) se voit vite.<\/p>\n<h2 class=\"wp-block-heading\">Les filtres de diffusion<\/h2>\n<p>Les capteurs modernes sont tr\u00e8s d\u00e9finis. Les filtres de diffusion adoucissent l\u2019image : ils font bavoir l\u00e9g\u00e8rement les sources lumineuses, att\u00e9nuent le contraste local et peaufinent les visages.<\/p>\n<figure class=\"tdp-fig\" style=\"margin:22px 0\"><svg viewBox=\"0 0 640 220\" role=\"img\" aria-label=\"Sch\u00e9ma d\u2019une source lumineuse avec une diffusion de plus en plus forte, de 1\/8 \u00e0 2\" xmlns=\"http:\/\/www.w3.org\/2000\/svg\" font-family=\"Inter,Helvetica,Arial,sans-serif\" style=\"width:100%;height:auto;display:block\"><rect width=\"640\" height=\"220\" fill=\"#161817\"\/><defs><radialGradient id=\"pm0\"><stop offset=\"0\" stop-color=\"#fff\" stop-opacity=\"1\"\/><stop offset=\"0.18\" stop-color=\"#fff\" stop-opacity=\".95\"\/><stop offset=\"1\" stop-color=\"#fff\" stop-opacity=\"0\"\/><\/radialGradient><radialGradient id=\"pm1\"><stop offset=\"0\" stop-color=\"#fff\" stop-opacity=\"1\"\/><stop offset=\"0.22\" stop-color=\"#fff\" stop-opacity=\".95\"\/><stop offset=\"1\" stop-color=\"#fff\" stop-opacity=\"0\"\/><\/radialGradient><radialGradient id=\"pm2\"><stop offset=\"0\" stop-color=\"#fff\" stop-opacity=\"1\"\/><stop offset=\"0.26\" stop-color=\"#fff\" stop-opacity=\".95\"\/><stop offset=\"1\" stop-color=\"#fff\" stop-opacity=\"0\"\/><\/radialGradient><radialGradient id=\"pm3\"><stop offset=\"0\" stop-color=\"#fff\" stop-opacity=\"1\"\/><stop offset=\"0.3\" stop-color=\"#fff\" stop-opacity=\".95\"\/><stop offset=\"1\" stop-color=\"#fff\" stop-opacity=\"0\"\/><\/radialGradient><radialGradient id=\"pm4\"><stop offset=\"0\" stop-color=\"#fff\" stop-opacity=\"1\"\/><stop offset=\"0.33999999999999997\" stop-color=\"#fff\" stop-opacity=\".95\"\/><stop offset=\"1\" stop-color=\"#fff\" stop-opacity=\"0\"\/><\/radialGradient><\/defs><text x=\"20\" y=\"30\" font-size=\"15\" font-weight=\"700\" fill=\"#ffd400\">Black Pro-Mist : intensit\u00e9 de la diffusion<\/text><rect x=\"18\" y=\"60\" width=\"104\" height=\"104\" rx=\"10\" fill=\"#0d0e0e\" stroke=\"#4a4f4c\"\/><circle cx=\"70\" cy=\"112\" r=\"22\" fill=\"url(#pm0)\" opacity=\"0.5\"\/><circle cx=\"70\" cy=\"112\" r=\"6\" fill=\"#fff\"\/><text x=\"70\" y=\"190\" font-size=\"14\" font-weight=\"700\" fill=\"#f2f0eb\" text-anchor=\"middle\">1\/8<\/text><rect x=\"143\" y=\"60\" width=\"104\" height=\"104\" rx=\"10\" fill=\"#0d0e0e\" stroke=\"#4a4f4c\"\/><circle cx=\"195\" cy=\"112\" r=\"29\" fill=\"url(#pm1)\" opacity=\"0.62\"\/><circle cx=\"195\" cy=\"112\" r=\"6\" fill=\"#fff\"\/><text x=\"195\" y=\"190\" font-size=\"14\" font-weight=\"700\" fill=\"#f2f0eb\" text-anchor=\"middle\">1\/4<\/text><rect x=\"268\" y=\"60\" width=\"104\" height=\"104\" rx=\"10\" fill=\"#0d0e0e\" stroke=\"#4a4f4c\"\/><circle cx=\"320\" cy=\"112\" r=\"36\" fill=\"url(#pm2)\" opacity=\"0.74\"\/><circle cx=\"320\" cy=\"112\" r=\"6\" fill=\"#fff\"\/><text x=\"320\" y=\"190\" font-size=\"14\" font-weight=\"700\" fill=\"#f2f0eb\" text-anchor=\"middle\">1\/2<\/text><rect x=\"393\" y=\"60\" width=\"104\" height=\"104\" rx=\"10\" fill=\"#0d0e0e\" stroke=\"#4a4f4c\"\/><circle cx=\"445\" cy=\"112\" r=\"43\" fill=\"url(#pm3)\" opacity=\"0.86\"\/><circle cx=\"445\" cy=\"112\" r=\"6\" fill=\"#fff\"\/><text x=\"445\" y=\"190\" font-size=\"14\" font-weight=\"700\" fill=\"#f2f0eb\" text-anchor=\"middle\">1<\/text><rect x=\"518\" y=\"60\" width=\"104\" height=\"104\" rx=\"10\" fill=\"#0d0e0e\" stroke=\"#4a4f4c\"\/><circle cx=\"570\" cy=\"112\" r=\"50\" fill=\"url(#pm4)\" opacity=\"0.98\"\/><circle cx=\"570\" cy=\"112\" r=\"6\" fill=\"#fff\"\/><text x=\"570\" y=\"190\" font-size=\"14\" font-weight=\"700\" fill=\"#f2f0eb\" text-anchor=\"middle\">2<\/text><text x=\"320\" y=\"212\" font-size=\"12\" fill=\"#9aa09d\" text-anchor=\"middle\">Plus la valeur augmente, plus la lueur autour des sources est marqu\u00e9e<\/text><\/svg><figcaption>Les grades de diffusion, de 1\/8 (tr\u00e8s discret) \u00e0 2 (marqu\u00e9).<\/figcaption><\/figure>\n<ul><li><strong>Pro-Mist et Black Pro-Mist :<\/strong> une lueur autour des hautes lumi\u00e8res. Le Black Pro-Mist pr\u00e9serve davantage les noirs ; le Pro-Mist les rel\u00e8ve un peu. Les grades vont de 1\/8 \u00e0 2 et plus.<\/li><li><strong>Hollywood Black Magic et Glimmerglass :<\/strong> des variantes qui bavent plus ou moins les sources et la texture.<\/li><li><strong>Classic Soft et Soft\/FX :<\/strong> adoucissent surtout les d\u00e9tails et la peau, avec moins de halo.<\/li><li><strong>Filtres \u00e0 tra\u00een\u00e9es (streak) :<\/strong> des tra\u00een\u00e9es horizontales autour des sources, inspir\u00e9es de l\u2019anamorphique.<\/li><\/ul>\n<h2 class=\"wp-block-heading\">Comment choisir ?<\/h2>\n<figure class=\"wp-block-table\"><table><thead><tr><th>Filtre<\/th><th>Effet<\/th><th>Usage typique<\/th><th>Attention<\/th><\/tr><\/thead><tbody><tr><td>ND fixe<\/td><td>Moins de lumi\u00e8re<\/td><td>Ext\u00e9rieur, grande ouverture<\/td><td>IR sur certains capteurs<\/td><\/tr><tr><td>IRND<\/td><td>Moins de lumi\u00e8re, sans d\u00e9rive IR<\/td><td>ND fort<\/td><td>Co\u00fbt<\/td><\/tr><tr><td>Polarisant<\/td><td>Reflets, ciel, saturation<\/td><td>Immobilier, mer, vitrines<\/td><td>Perd 1,5 \u00e0 2 stops<\/td><\/tr><tr><td>ND d\u00e9grad\u00e9<\/td><td>\u00c9quilibrer le ciel<\/td><td>Paysages, drone<\/td><td>Horizon irr\u00e9gulier<\/td><\/tr><tr><td>Black Pro-Mist 1\/8 \u00e0 1\/4<\/td><td>Adoucit, lueur discr\u00e8te<\/td><td>Interviews, lifestyle<\/td><td>Test selon les sources<\/td><\/tr><tr><td>Diffusion forte<\/td><td>Ambiance onirique<\/td><td>Fiction, clip<\/td><td>Perte de nettet\u00e9<\/td><\/tr><\/tbody><\/table><\/figure>\n<div class=\"tdp-tip\"><p><strong>Notre approche.<\/strong> Un ND adapt\u00e9 pour garder la bonne vitesse d\u2019obturation, un Black Pro-Mist l\u00e9ger pour adoucir les images trop nettes, et toujours un test avant le tournage : l\u2019effet d\u00e9pend de l\u2019objectif, de l\u2019ouverture et des sources dans le cadre. Notre mat\u00e9riel est pr\u00e9sent\u00e9 sur la page <a href=\"https:\/\/thatdog.fr\/index.php\/materiel\/\">mat\u00e9riel<\/a>.<\/p><\/div>\n<p>Une diffusion se simule mal en post-production : la lueur na\u00eet dans l\u2019optique et suit la lumi\u00e8re r\u00e9elle. Un ND, lui, est indispensable pour garder un rendu cin\u00e9matographique en plein jour.<\/p>\n<div class=\"tdp-cta\"><p><strong>Un look \u00e0 d\u00e9finir pour votre film ?<\/strong><br>Parlez-nous de l\u2019ambiance recherch\u00e9e : nous choisissons les optiques et les filtres.<\/p><a href=\"https:\/\/thatdog.fr\/index.php\/devis\/\">Demander un devis \u2192<\/a><\/div>[\/et_pb_text][\/et_pb_column]\n\t\t\t[\/et_pb_row]\n\t\t[\/et_pb_section]\n","protected":false},"excerpt":{"rendered":"<p>ND, IRND, polarisant, Black Pro-Mist et diffusion : \u00e0 quoi servent les filtres optiques de cin\u00e9ma, comment les choisir et quand les utiliser.<\/p>\n","protected":false},"author":1,"featured_media":1148,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"_et_pb_use_builder":"on","_et_pb_old_content":"<p>Un filtre se place devant l\u2019objectif et modifie la lumi\u00e8re avant qu\u2019elle n\u2019atteigne le capteur. Certains filtres sont purement techniques (ND), d\u2019autres fa\u00e7onnent l\u2019image (diffusion). Voici les familles utilis\u00e9es sur un tournage, ce qu\u2019elles font et comment nous les choisissons.<\/p>\n<h2 class=\"wp-block-heading\">O\u00f9 se place un filtre ?<\/h2>\n<p>Sur un objectif photo, on visse le filtre \u00e0 l\u2019avant. Sur un tournage, on utilise un pare-soleil \u00e0 compendium (matte box) qui accueille des filtres rectangulaires de 4 \u00d7 5,65 pouces, 4 \u00d7 4 ou 6,6 \u00d7 6,6 pouces, interchangeables en quelques secondes et empilables. Certaines cam\u00e9ras int\u00e8grent aussi des filtres ND internes.<\/p>\n<h2 class=\"wp-block-heading\">Les filtres ND (densit\u00e9 neutre)<\/h2>\n<p>Un filtre ND r\u00e9duit la lumi\u00e8re sans changer les couleurs. En plein soleil, il permet de garder une grande ouverture pour un arri\u00e8re-plan flou, tout en respectant une vitesse d\u2019obturation proche de 1\/50 s pour 25 images par seconde, soit l\u2019obturateur \u00e0 180\u00b0.<\/p>\n<figure class=\"tdp-fig\" style=\"margin:22px 0\"><svg viewBox=\"0 0 640 250\" role=\"img\" aria-label=\"Graphique des filtres ND de 0,3 \u00e0 2,1 avec la lumi\u00e8re transmise\" xmlns=\"http:\/\/www.w3.org\/2000\/svg\" font-family=\"Inter,Helvetica,Arial,sans-serif\" style=\"width:100%;height:auto;display:block\"><rect width=\"640\" height=\"250\" fill=\"#161817\"\/><text x=\"20\" y=\"28\" font-size=\"15\" font-weight=\"700\" fill=\"#ffd400\">Filtres ND : lumi\u00e8re transmise<\/text><text x=\"620\" y=\"28\" font-size=\"12\" fill=\"#9aa09d\" text-anchor=\"end\">Densit\u00e9 \u00b7 lumi\u00e8re transmise<\/text><rect x=\"40\" y=\"70\" width=\"64\" height=\"130\" rx=\"6\" fill=\"#ffd400\"\/><text x=\"72\" y=\"62\" font-size=\"12\" font-weight=\"700\" fill=\"#f2f0eb\" text-anchor=\"middle\">50 %<\/text><text x=\"72\" y=\"218\" font-size=\"13\" font-weight=\"700\" fill=\"#f2f0eb\" text-anchor=\"middle\">ND 0.3<\/text><text x=\"72\" y=\"234\" font-size=\"11\" fill=\"#9aa09d\" text-anchor=\"middle\">1 stops<\/text><rect x=\"138\" y=\"135\" width=\"64\" height=\"65\" rx=\"6\" fill=\"#ffd400\"\/><text x=\"170\" y=\"127\" font-size=\"12\" font-weight=\"700\" fill=\"#f2f0eb\" text-anchor=\"middle\">25 %<\/text><text x=\"170\" y=\"218\" font-size=\"13\" font-weight=\"700\" fill=\"#f2f0eb\" text-anchor=\"middle\">ND 0.6<\/text><text x=\"170\" y=\"234\" font-size=\"11\" fill=\"#9aa09d\" text-anchor=\"middle\">2 stops<\/text><rect x=\"236\" y=\"167.5\" width=\"64\" height=\"32.5\" rx=\"6\" fill=\"#ffd400\"\/><text x=\"268\" y=\"159.5\" font-size=\"12\" font-weight=\"700\" fill=\"#f2f0eb\" text-anchor=\"middle\">12.5 %<\/text><text x=\"268\" y=\"218\" font-size=\"13\" font-weight=\"700\" fill=\"#f2f0eb\" text-anchor=\"middle\">ND 0.9<\/text><text x=\"268\" y=\"234\" font-size=\"11\" fill=\"#9aa09d\" text-anchor=\"middle\">3 stops<\/text><rect x=\"334\" y=\"183.75\" width=\"64\" height=\"16.25\" rx=\"6\" fill=\"#ffd400\"\/><text x=\"366\" y=\"175.75\" font-size=\"12\" font-weight=\"700\" fill=\"#f2f0eb\" text-anchor=\"middle\">6.25 %<\/text><text x=\"366\" y=\"218\" font-size=\"13\" font-weight=\"700\" fill=\"#f2f0eb\" text-anchor=\"middle\">ND 1.2<\/text><text x=\"366\" y=\"234\" font-size=\"11\" fill=\"#9aa09d\" text-anchor=\"middle\">4 stops<\/text><rect x=\"432\" y=\"195.944\" width=\"64\" height=\"4.056\" rx=\"6\" fill=\"#ffd400\"\/><text x=\"464\" y=\"187.944\" font-size=\"12\" font-weight=\"700\" fill=\"#f2f0eb\" text-anchor=\"middle\">1.56 %<\/text><text x=\"464\" y=\"218\" font-size=\"13\" font-weight=\"700\" fill=\"#f2f0eb\" text-anchor=\"middle\">ND 1.8<\/text><text x=\"464\" y=\"234\" font-size=\"11\" fill=\"#9aa09d\" text-anchor=\"middle\">6 stops<\/text><rect x=\"530\" y=\"196\" width=\"64\" height=\"4\" rx=\"6\" fill=\"#ffd400\"\/><text x=\"562\" y=\"188\" font-size=\"12\" font-weight=\"700\" fill=\"#f2f0eb\" text-anchor=\"middle\">0.78 %<\/text><text x=\"562\" y=\"218\" font-size=\"13\" font-weight=\"700\" fill=\"#f2f0eb\" text-anchor=\"middle\">ND 2.1<\/text><text x=\"562\" y=\"234\" font-size=\"11\" fill=\"#9aa09d\" text-anchor=\"middle\">7 stops<\/text><\/svg><figcaption>Chaque tranche de 0,3 de densit\u00e9 retire un diaphragme (stop) de lumi\u00e8re.<\/figcaption><\/figure>\n<ul><li><strong>ND 0.3, 0.6, 0.9 :<\/strong> 1, 2 ou 3 diaphragmes en moins, pour des journ\u00e9es couvertes ou une lumi\u00e8re mod\u00e9r\u00e9e.<\/li><li><strong>ND 1.2 et plus :<\/strong> 4 diaphragmes et au-del\u00e0, pour le plein soleil \u00e0 grande ouverture.<\/li><li><strong>IRND :<\/strong> certains capteurs sont sensibles \u00e0 l\u2019infrarouge ; avec un ND fort, les noirs peuvent virer au magenta ou au brun. Un ND IRND filtre aussi l\u2019infrarouge pour l\u2019\u00e9viter.<\/li><li><strong>ND variable :<\/strong> pratique en photo et en reportage, mais il peut cr\u00e9er des teintes ou un motif sombre en croix \u00e0 forte densit\u00e9. Nous pr\u00e9f\u00e9rons des ND fixes en tournage exigeant.<\/li><\/ul>\n<h2 class=\"wp-block-heading\">Le polarisant<\/h2>\n<p>Le filtre polarisant att\u00e9nue les reflets sur l\u2019eau, le verre ou les feuilles, assombrit un ciel bleu et ajoute de la densit\u00e9 aux couleurs. Il retire environ un diaphragme et demi \u00e0 deux. Il se r\u00e8gle en le faisant tourner, et son effet d\u00e9pend de l\u2019angle par rapport au soleil. Il est pr\u00e9cieux pour l\u2019immobilier, la mer et les vitrines.<\/p>\n<h2 class=\"wp-block-heading\">Les ND d\u00e9grad\u00e9s<\/h2>\n<p>Un ND d\u00e9grad\u00e9 est teint\u00e9 sur une moiti\u00e9 et clair sur l\u2019autre. Plac\u00e9 avec la partie sombre sur le ciel, il \u00e9quilibre l\u2019exposition d\u2019un paysage. Il existe en transition douce ou franche ; un horizon irr\u00e9gulier (arbres, b\u00e2timents) se voit vite.<\/p>\n<h2 class=\"wp-block-heading\">Les filtres de diffusion<\/h2>\n<p>Les capteurs modernes sont tr\u00e8s d\u00e9finis. Les filtres de diffusion adoucissent l\u2019image : ils font bavoir l\u00e9g\u00e8rement les sources lumineuses, att\u00e9nuent le contraste local et peaufinent les visages.<\/p>\n<figure class=\"tdp-fig\" style=\"margin:22px 0\"><svg viewBox=\"0 0 640 220\" role=\"img\" aria-label=\"Sch\u00e9ma d\u2019une source lumineuse avec une diffusion de plus en plus forte, de 1\/8 \u00e0 2\" xmlns=\"http:\/\/www.w3.org\/2000\/svg\" font-family=\"Inter,Helvetica,Arial,sans-serif\" style=\"width:100%;height:auto;display:block\"><rect width=\"640\" height=\"220\" fill=\"#161817\"\/><defs><radialGradient id=\"pm0\"><stop offset=\"0\" stop-color=\"#fff\" stop-opacity=\"1\"\/><stop offset=\"0.18\" stop-color=\"#fff\" stop-opacity=\".95\"\/><stop offset=\"1\" stop-color=\"#fff\" stop-opacity=\"0\"\/><\/radialGradient><radialGradient id=\"pm1\"><stop offset=\"0\" stop-color=\"#fff\" stop-opacity=\"1\"\/><stop offset=\"0.22\" stop-color=\"#fff\" stop-opacity=\".95\"\/><stop offset=\"1\" stop-color=\"#fff\" stop-opacity=\"0\"\/><\/radialGradient><radialGradient id=\"pm2\"><stop offset=\"0\" stop-color=\"#fff\" stop-opacity=\"1\"\/><stop offset=\"0.26\" stop-color=\"#fff\" stop-opacity=\".95\"\/><stop offset=\"1\" stop-color=\"#fff\" stop-opacity=\"0\"\/><\/radialGradient><radialGradient id=\"pm3\"><stop offset=\"0\" stop-color=\"#fff\" stop-opacity=\"1\"\/><stop offset=\"0.3\" stop-color=\"#fff\" stop-opacity=\".95\"\/><stop offset=\"1\" stop-color=\"#fff\" stop-opacity=\"0\"\/><\/radialGradient><radialGradient id=\"pm4\"><stop offset=\"0\" stop-color=\"#fff\" stop-opacity=\"1\"\/><stop offset=\"0.33999999999999997\" stop-color=\"#fff\" stop-opacity=\".95\"\/><stop offset=\"1\" stop-color=\"#fff\" stop-opacity=\"0\"\/><\/radialGradient><\/defs><text x=\"20\" y=\"30\" font-size=\"15\" font-weight=\"700\" fill=\"#ffd400\">Black Pro-Mist : intensit\u00e9 de la diffusion<\/text><rect x=\"18\" y=\"60\" width=\"104\" height=\"104\" rx=\"10\" fill=\"#0d0e0e\" stroke=\"#4a4f4c\"\/><circle cx=\"70\" cy=\"112\" r=\"22\" fill=\"url(#pm0)\" opacity=\"0.5\"\/><circle cx=\"70\" cy=\"112\" r=\"6\" fill=\"#fff\"\/><text x=\"70\" y=\"190\" font-size=\"14\" font-weight=\"700\" fill=\"#f2f0eb\" text-anchor=\"middle\">1\/8<\/text><rect x=\"143\" y=\"60\" width=\"104\" height=\"104\" rx=\"10\" fill=\"#0d0e0e\" stroke=\"#4a4f4c\"\/><circle cx=\"195\" cy=\"112\" r=\"29\" fill=\"url(#pm1)\" opacity=\"0.62\"\/><circle cx=\"195\" cy=\"112\" r=\"6\" fill=\"#fff\"\/><text x=\"195\" y=\"190\" font-size=\"14\" font-weight=\"700\" fill=\"#f2f0eb\" text-anchor=\"middle\">1\/4<\/text><rect x=\"268\" y=\"60\" width=\"104\" height=\"104\" rx=\"10\" fill=\"#0d0e0e\" stroke=\"#4a4f4c\"\/><circle cx=\"320\" cy=\"112\" r=\"36\" fill=\"url(#pm2)\" opacity=\"0.74\"\/><circle cx=\"320\" cy=\"112\" r=\"6\" fill=\"#fff\"\/><text x=\"320\" y=\"190\" font-size=\"14\" font-weight=\"700\" fill=\"#f2f0eb\" text-anchor=\"middle\">1\/2<\/text><rect x=\"393\" y=\"60\" width=\"104\" height=\"104\" rx=\"10\" fill=\"#0d0e0e\" stroke=\"#4a4f4c\"\/><circle cx=\"445\" cy=\"112\" r=\"43\" fill=\"url(#pm3)\" opacity=\"0.86\"\/><circle cx=\"445\" cy=\"112\" r=\"6\" fill=\"#fff\"\/><text x=\"445\" y=\"190\" font-size=\"14\" font-weight=\"700\" fill=\"#f2f0eb\" text-anchor=\"middle\">1<\/text><rect x=\"518\" y=\"60\" width=\"104\" height=\"104\" rx=\"10\" fill=\"#0d0e0e\" stroke=\"#4a4f4c\"\/><circle cx=\"570\" cy=\"112\" r=\"50\" fill=\"url(#pm4)\" opacity=\"0.98\"\/><circle cx=\"570\" cy=\"112\" r=\"6\" fill=\"#fff\"\/><text x=\"570\" y=\"190\" font-size=\"14\" font-weight=\"700\" fill=\"#f2f0eb\" text-anchor=\"middle\">2<\/text><text x=\"320\" y=\"212\" font-size=\"12\" fill=\"#9aa09d\" text-anchor=\"middle\">Plus la valeur augmente, plus la lueur autour des sources est marqu\u00e9e<\/text><\/svg><figcaption>Les grades de diffusion, de 1\/8 (tr\u00e8s discret) \u00e0 2 (marqu\u00e9).<\/figcaption><\/figure>\n<ul><li><strong>Pro-Mist et Black Pro-Mist :<\/strong> une lueur autour des hautes lumi\u00e8res. Le Black Pro-Mist pr\u00e9serve davantage les noirs ; le Pro-Mist les rel\u00e8ve un peu. Les grades vont de 1\/8 \u00e0 2 et plus.<\/li><li><strong>Hollywood Black Magic et Glimmerglass :<\/strong> des variantes qui bavent plus ou moins les sources et la texture.<\/li><li><strong>Classic Soft et Soft\/FX :<\/strong> adoucissent surtout les d\u00e9tails et la peau, avec moins de halo.<\/li><li><strong>Filtres \u00e0 tra\u00een\u00e9es (streak) :<\/strong> des tra\u00een\u00e9es horizontales autour des sources, inspir\u00e9es de l\u2019anamorphique.<\/li><\/ul>\n<h2 class=\"wp-block-heading\">Comment choisir ?<\/h2>\n<figure class=\"wp-block-table\"><table><thead><tr><th>Filtre<\/th><th>Effet<\/th><th>Usage typique<\/th><th>Attention<\/th><\/tr><\/thead><tbody><tr><td>ND fixe<\/td><td>Moins de lumi\u00e8re<\/td><td>Ext\u00e9rieur, grande ouverture<\/td><td>IR sur certains capteurs<\/td><\/tr><tr><td>IRND<\/td><td>Moins de lumi\u00e8re, sans d\u00e9rive IR<\/td><td>ND fort<\/td><td>Co\u00fbt<\/td><\/tr><tr><td>Polarisant<\/td><td>Reflets, ciel, saturation<\/td><td>Immobilier, mer, vitrines<\/td><td>Perd 1,5 \u00e0 2 stops<\/td><\/tr><tr><td>ND d\u00e9grad\u00e9<\/td><td>\u00c9quilibrer le ciel<\/td><td>Paysages, drone<\/td><td>Horizon irr\u00e9gulier<\/td><\/tr><tr><td>Black Pro-Mist 1\/8 \u00e0 1\/4<\/td><td>Adoucit, lueur discr\u00e8te<\/td><td>Interviews, lifestyle<\/td><td>Test selon les sources<\/td><\/tr><tr><td>Diffusion forte<\/td><td>Ambiance onirique<\/td><td>Fiction, clip<\/td><td>Perte de nettet\u00e9<\/td><\/tr><\/tbody><\/table><\/figure>\n<div class=\"tdp-tip\"><p><strong>Notre approche.<\/strong> Un ND adapt\u00e9 pour garder la bonne vitesse d\u2019obturation, un Black Pro-Mist l\u00e9ger pour adoucir les images trop nettes, et toujours un test avant le tournage : l\u2019effet d\u00e9pend de l\u2019objectif, de l\u2019ouverture et des sources dans le cadre. Notre mat\u00e9riel est pr\u00e9sent\u00e9 sur la page <a href=\"https:\/\/thatdog.fr\/index.php\/materiel\/\">mat\u00e9riel<\/a>.<\/p><\/div>\n<p>Une diffusion se simule mal en post-production : la lueur na\u00eet dans l\u2019optique et suit la lumi\u00e8re r\u00e9elle. Un ND, lui, est indispensable pour garder un rendu cin\u00e9matographique en plein jour.<\/p>\n<div class=\"tdp-cta\"><p><strong>Un look \u00e0 d\u00e9finir pour votre film ?<\/strong><br>Parlez-nous de l\u2019ambiance recherch\u00e9e : nous choisissons les optiques et les filtres.<\/p><a href=\"https:\/\/thatdog.fr\/index.php\/devis\/\">Demander un devis \u2192<\/a><\/div>","_et_gb_content_width":"","footnotes":""},"categories":[232],"tags":[18,8],"class_list":["post-1183","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-mag-a-fr","tag-tournage","tag-video"],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v28.6 - https:\/\/yoast.com\/product\/yoast-seo-wordpress\/ -->\n<title>Filtres optiques de cin\u00e9ma : ND, Mist, diffusion et polarisants<\/title>\n<meta name=\"description\" content=\"ND, IRND, polarisant, Black Pro-Mist et diffusion : \u00e0 quoi servent les filtres optiques de cin\u00e9ma, comment les choisir et 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