{"id":52797,"date":"2026-02-25T10:45:27","date_gmt":"2026-02-25T09:45:27","guid":{"rendered":"https:\/\/www.chassimages.com\/?p=52797"},"modified":"2026-02-26T13:00:52","modified_gmt":"2026-02-26T12:00:52","slug":"deux-objectifs-fixes-sigma-tres-lumineux","status":"publish","type":"post","link":"https:\/\/www.chassimages.com\/index.php\/2026\/02\/25\/deux-objectifs-fixes-sigma-tres-lumineux\/","title":{"rendered":"Deux objectifs fixes Sigma tr\u00e8s lumineux"},"content":{"rendered":"[et_pb_section fb_built=\u00a0\u00bb1&Prime; _builder_version=\u00a0\u00bb4.27.4&Prime; _module_preset=\u00a0\u00bbdefault\u00a0\u00bb global_colors_info=\u00a0\u00bb{}\u00a0\u00bb][et_pb_row _builder_version=\u00a0\u00bb4.27.4&Prime; _module_preset=\u00a0\u00bbdefault\u00a0\u00bb global_colors_info=\u00a0\u00bb{}\u00a0\u00bb][et_pb_column type=\u00a0\u00bb4_4&Prime; _builder_version=\u00a0\u00bb4.27.4&Prime; _module_preset=\u00a0\u00bbdefault\u00a0\u00bb global_colors_info=\u00a0\u00bb{}\u00a0\u00bb][et_pb_text _builder_version=\u00a0\u00bb4.27.4&Prime; _module_preset=\u00a0\u00bbdefault\u00a0\u00bb global_colors_info=\u00a0\u00bb{}\u00a0\u00bb]\n<p><strong>Sigma 35 mm <\/strong><strong>f\/1,<\/strong><strong>4 DG II Art<\/strong><\/p>\n<p><span style=\"font-size: medium\">Sigma annonce le <\/span><strong><span style=\"font-size: medium\">Sigma 35 mm <\/span><\/strong><strong><span style=\"font-size: medium\">f\/1,<\/span><\/strong><strong><span style=\"font-size: medium\">4 DG II Art<\/span><\/strong><span style=\"font-size: medium\">, nouvelle version de sa focale fixe lumineuse destin\u00e9e aux hybrides plein format en monture L-Mount et Sony E. La commercialisation est pr\u00e9vue pour le 16 avril 2026.<\/span><\/p>\n<p><span style=\"font-size: medium\">Cette seconde g\u00e9n\u00e9ration repose sur une formule optique enti\u00e8rement revue de <\/span><strong><span style=\"font-size: medium\">15 \u00e9l\u00e9ments en 12 groupes<\/span><\/strong><span style=\"font-size: medium\">, int\u00e9grant <\/span><strong><span style=\"font-size: medium\">quatre lentilles asph\u00e9riques<\/span><\/strong><span style=\"font-size: medium\"> et <\/span><strong><span style=\"font-size: medium\">deux \u00e9l\u00e9ments SLD<\/span><\/strong><span style=\"font-size: medium\">. Sigma indique avoir travaill\u00e9 en particulier la correction de l\u2019aberration chromatique axiale, point souvent critique sur les optiques tr\u00e8s lumineuses. L\u2019objectif est dot\u00e9 d\u2019un <\/span><strong><span style=\"font-size: medium\">diaphragme circulaire \u00e0 11 lamelles<\/span><\/strong><span style=\"font-size: medium\">.<\/span><\/p>\n<p><span style=\"font-size: medium\">Un nouveau traitement <\/span><strong><span style=\"font-size: medium\">AAC (Advanced Amorphous Coating)<\/span><\/strong><span style=\"font-size: medium\"> est appliqu\u00e9 afin de limiter reflets et lumi\u00e8res parasites. Le constructeur annonce \u00e9galement une r\u00e9duction du focus breathing gr\u00e2ce \u00e0 une optimisation du groupe de mise au point.<\/span><\/p>\n<p><span style=\"font-size: medium\">Sur le plan m\u00e9canique, l\u2019objectif adopte un syst\u00e8me de mise au point flottante et gagne en compacit\u00e9 par rapport au 35 mm <\/span><span style=\"font-size: medium\">f\/1,<\/span><span style=\"font-size: medium\">4 DG DN Art : il serait environ <\/span><strong><span style=\"font-size: medium\">14 % plus court et 20 % plus l\u00e9ger<\/span><\/strong><span style=\"font-size: medium\">. L\u2019autofocus repose sur un <\/span><strong><span style=\"font-size: medium\">double moteur lin\u00e9aire HLA (High-response Linear Actuator)<\/span><\/strong><span style=\"font-size: medium\"> destin\u00e9 \u00e0 d\u00e9placer rapidement le groupe optique interne.<\/span><\/p>\n<p><span style=\"font-size: medium\">L\u2019optique int\u00e8gre une <\/span><strong><span style=\"font-size: medium\">bague d\u2019ouverture<\/span><\/strong><span style=\"font-size: medium\">, un <\/span><strong><span style=\"font-size: medium\">commutateur de clic<\/span><\/strong><span style=\"font-size: medium\">, un <\/span><strong><span style=\"font-size: medium\">verrouillage de diaphragme<\/span><\/strong><span style=\"font-size: medium\">, ainsi qu\u2019un <\/span><strong><span style=\"font-size: medium\">bouton AFL programmable<\/span><\/strong><span style=\"font-size: medium\"> (deux positions). Elle b\u00e9n\u00e9ficie d\u2019une <\/span><strong><span style=\"font-size: medium\">construction r\u00e9sistante \u00e0 la poussi\u00e8re et aux \u00e9claboussures<\/span><\/strong><span style=\"font-size: medium\"> (non \u00e9tanche), compl\u00e9t\u00e9e par un <\/span><strong><span style=\"font-size: medium\">rev\u00eatement hydrofuge et ol\u00e9ofuge<\/span><\/strong><span style=\"font-size: medium\"> sur la lentille frontale. Un pare-soleil en corolle avec m\u00e9canisme de verrouillage est fourni.<\/span><\/p>\n<h2 class=\"western\"><span style=\"font-size: medium\">Sigma 15 mm f\/1,4 DC Contemporary<\/span><\/h2>\n<p><span style=\"font-size: medium\">Sigma lance parall\u00e8lement le <\/span><strong><span style=\"font-size: medium\">Sigma 15 mm <\/span><\/strong><strong><span style=\"font-size: medium\">f\/1,<\/span><\/strong><strong><span style=\"font-size: medium\">4 DC | Contemporary<\/span><\/strong><span style=\"font-size: medium\">, destin\u00e9 aux hybrides APS-C en montures Sony E, Fujifilm X et Canon RF. La disponibilit\u00e9 est annonc\u00e9e pour le 12 mars 2026.<\/span><\/p>\n<p><span style=\"font-size: medium\">Cette focale fixe offre une ouverture maximale <\/span><span style=\"font-size: medium\"><b>f\/1,<\/b><\/span><strong><span style=\"font-size: medium\">4<\/span><\/strong><span style=\"font-size: medium\"> et correspond \u00e0 un \u00e9quivalent <\/span><strong><span style=\"font-size: medium\">22,5 mm en plein format<\/span><\/strong><span style=\"font-size: medium\"> (24 mm en monture Canon RF). En monture Sony E, l\u2019objectif mesure <\/span><strong><span style=\"font-size: medium\">64,8 mm de long<\/span><\/strong><span style=\"font-size: medium\"> pour un poids annonc\u00e9 de <\/span><strong><span style=\"font-size: medium\">220 g<\/span><\/strong><span style=\"font-size: medium\">.<\/span><\/p>\n<p><span style=\"font-size: medium\">La formule optique comprend <\/span><strong><span style=\"font-size: medium\">un \u00e9l\u00e9ment FLD<\/span><\/strong><span style=\"font-size: medium\">, <\/span><strong><span style=\"font-size: medium\">trois \u00e9l\u00e9ments SLD<\/span><\/strong><span style=\"font-size: medium\"> et <\/span><strong><span style=\"font-size: medium\">trois lentilles asph\u00e9riques double face<\/span><\/strong><span style=\"font-size: medium\">. Sigma met en avant un travail particulier sur la nettet\u00e9 en p\u00e9riph\u00e9rie et la correction de la coma sagittale, souvent visible sur les grands-angles lumineux. Le diaphragme comporte <\/span><strong><span style=\"font-size: medium\">neuf lamelles<\/span><\/strong><span style=\"font-size: medium\">.<\/span><\/p>\n<p><span style=\"font-size: medium\">Par rapport au 16 mm <\/span><span style=\"font-size: medium\">f\/1,<\/span><span style=\"font-size: medium\">4 DC DN | Contemporary, ce nouveau mod\u00e8le serait environ <\/span><strong><span style=\"font-size: medium\">30 % plus court et 50 % plus l\u00e9ger<\/span><\/strong><span style=\"font-size: medium\">. L\u2019autofocus repose sur un <\/span><strong><span style=\"font-size: medium\">moteur pas \u00e0 pas<\/span><\/strong><span style=\"font-size: medium\">, avec une r\u00e9duction annonc\u00e9e du focus breathing pour un usage vid\u00e9o.<\/span><\/p>\n<p><span style=\"font-size: medium\">L\u2019objectif dispose d\u2019une <\/span><strong><span style=\"font-size: medium\">bague de diaphragme<\/span><\/strong><span style=\"font-size: medium\"> (remplac\u00e9e par une bague de contr\u00f4le en monture Canon RF), ainsi que d\u2019une <\/span><strong><span style=\"font-size: medium\">construction r\u00e9sistante \u00e0 la poussi\u00e8re et aux \u00e9claboussures<\/span><\/strong><span style=\"font-size: medium\"> (non \u00e9tanche) et d\u2019un <\/span><strong><span style=\"font-size: medium\">rev\u00eatement hydrofuge et ol\u00e9ofuge<\/span><\/strong><span style=\"font-size: medium\"> sur la lentille frontale.<\/span><\/p>\n<p><span style=\"font-size: medium\">Avec cette r\u00e9f\u00e9rence, Sigma compl\u00e8te sa s\u00e9rie APS-C \u00e0 ouverture f\/1,4, qui couvre d\u00e9sormais du 12 mm au 56 mm.<\/span><\/p>\n[\/et_pb_text][et_pb_gallery gallery_ids=\u00a0\u00bb52796,52795&Prime; posts_number=\u00a0\u00bb2&Prime; show_title_and_caption=\u00a0\u00bboff\u00a0\u00bb show_pagination=\u00a0\u00bboff\u00a0\u00bb _builder_version=\u00a0\u00bb4.27.4&Prime; _module_preset=\u00a0\u00bbdefault\u00a0\u00bb global_colors_info=\u00a0\u00bb{}\u00a0\u00bb][\/et_pb_gallery][\/et_pb_column][\/et_pb_row][\/et_pb_section]\n","protected":false},"excerpt":{"rendered":"<p>Sigma 35 mm f\/1,4 DG II Art Sigma annonce le Sigma 35 mm f\/1,4 DG II Art, nouvelle version de sa focale fixe lumineuse destin\u00e9e aux hybrides plein format en monture L-Mount et Sony E. La commercialisation est pr\u00e9vue pour le 16 avril 2026. Cette seconde g\u00e9n\u00e9ration repose sur une formule optique enti\u00e8rement revue de [&hellip;]<\/p>\n","protected":false},"author":13,"featured_media":52795,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"_et_pb_use_builder":"on","_et_pb_old_content":"","_et_gb_content_width":"","footnotes":""},"categories":[2,8157],"tags":[918,63],"class_list":["post-52797","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-lesinfos","category-objectifs","tag-objectif","tag-sigma","et-has-post-format-content","et_post_format-et-post-format-standard"],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v27.2 - https:\/\/yoast.com\/product\/yoast-seo-wordpress\/ -->\n<title>Deux objectifs fixes Sigma tr\u00e8s lumineux<\/title>\n<meta name=\"description\" content=\"D\u00e9couvrez deux nouveaux objectifs fixes Sigma ultra lumineux : 35 mm f\/1.2 DG II Art et 135 mm f\/1.4 DG Art 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