{"id":8,"date":"2017-04-29T17:45:12","date_gmt":"2017-04-29T15:45:12","guid":{"rendered":"https:\/\/6x7.ch\/photographie\/?page_id=8"},"modified":"2025-04-07T18:04:38","modified_gmt":"2025-04-07T16:04:38","slug":"une-histoire-de-format-ou-une-question-de-proportion","status":"publish","type":"page","link":"https:\/\/6x7.ch\/photographie\/accueil\/une-histoire-de-format-ou-une-question-de-proportion\/","title":{"rendered":"Une histoire de format ou une question de proportion"},"content":{"rendered":"\n

La photographie, c’est une longue histoire : magie de la chimie et de la chambre noire o\u00f9 les images apparaissent dans les bassines de produits chimiques, \u00e9merveillement devant les m\u00e9caniques de pr\u00e9cision venues du Japon, d’Allemagne ou de Su\u00e8de, fascination pour les oeuvres des auteurs \u00ab\u00a0historiques\u00a0\u00bb du vingti\u00e8me si\u00e8cle…<\/p>\n\n\n\n

A propos de 6×7<\/h2>\n\n\n\n

Format classique de la photographie argentique, celle o\u00f9 l’on devait mettre dans son appareil une pellicule tous les 36, 24, voire m\u00eame 12 d\u00e9clenchements, le 6×7 est le format qui offre la plus grande surface de pellicule avec des appareils de prise de vue encore utilisable \u00e0 main lev\u00e9e. Je vais tenter de r\u00e9sumer plus d’un si\u00e8cle de d\u00e9bats autour de ce qui n’est, selon les go\u00fbts de chacun, qu’une histoire de format ou une question de proportion.<\/p>\n\n\n\n

<\/div>\n\n\n\n
\"photographes<\/a>
le meilleur appareil photographique du monde, c’est celui que vous avez en mains au moment o\u00f9 il y a une photo \u00e0 faire…<\/figcaption><\/figure>\n\n\n\n
<\/div>\n\n\n\n

Question de format<\/h2>\n\n\n\n

Le 6×7 est un format un peu plus carr\u00e9 que les images habituelles : le traditionnel 24×36 de l’\u00e9poque argentique a une proportion 2×3. Mais question format, r\u00e9cemment, la tradition a plut\u00f4t vol\u00e9 en \u00e9clat. Sans compter que, bien avant la photographie au t\u00e9l\u00e9phone mobile, cette proportion de 2×3 n’avait pas le monopole dans les pr\u00e9f\u00e9rences des photographes. J’ai beaucoup appr\u00e9ci\u00e9 les appareils en 4,5×6, \u00e9norm\u00e9ment les 6×6 avec un format carr\u00e9 qui est incomparable pour de nombreux sujets – et au del\u00e0 du 6×7, il existait des grands formats, mais les appareils n\u00e9cessitaient une prise de vue sur pied, et si le r\u00e9sultat est surement incomparable, je n’ai pas le gout du statique…<\/p>\n\n\n\n

Il y a aussi une minorit\u00e9 de fanatiques du panoramique, avec des proportions variables, mais pour simplifier, \u00e0 partir du 2×1 et au del\u00e0 (3×1, 16×9, etc.)<\/p>\n\n\n\n

En dehors de la proportion largeur\/hauteur, l’enjeu principal en photographie argentique \u00e9tait de disposer d’une surface sensible la plus grande possible pour que le rapport d’agrandissement entre la pellicule et le futur tirage sur papier soit le plus faible possible, gage de la meilleure qualit\u00e9.<\/p>\n\n\n\n

Les nouveaux formats num\u00e9riques<\/h2>\n\n\n\n

Avec les appareils photos num\u00e9riques, les proportions des images sont rest\u00e9es identiques au 2×3, m\u00eame si la surface des capteurs diminuait, pour des raisons de co\u00fbts ou de technologie. Certains fabricants ont tout de m\u00eame propos\u00e9 un nouveau standard, le 4×3.<\/p>\n\n\n\n

Mais la r\u00e9volution est venue des t\u00e9l\u00e9phones qui s’am\u00e9liorent sans cesse, et surtout, que nous avons toujours en main ou au moins en poche). Car la d\u00e9finition du bon appareil, ce sera toujours \u00ab\u00a0celui que vous avez en mains au moment o\u00f9 il y a une photo \u00e0 faire…\u00a0\u00bb<\/p>\n","protected":false},"excerpt":{"rendered":"

La photographie, c’est une longue histoire : magie de la chimie et de la chambre noire o\u00f9 les images apparaissent dans les bassines de produits chimiques, \u00e9merveillement devant les m\u00e9caniques …<\/p>\n","protected":false},"author":2,"featured_media":48,"parent":7,"menu_order":0,"comment_status":"closed","ping_status":"closed","template":"","meta":{"_uag_custom_page_level_css":"","footnotes":""},"class_list":["post-8","page","type-page","status-publish","has-post-thumbnail","hentry"],"yoast_head":"\nUne histoire de format ou une question de proportion - 6x7 images<\/title>\n<meta name=\"description\" content=\"La photographie de la magie, de l'\u00e9merveillement et de la fascination, 6x7 c'est une histoire de format ou une question de proportion\" \/>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" 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