{"id":5755,"date":"2026-07-09T17:35:47","date_gmt":"2026-07-09T16:35:47","guid":{"rendered":"https:\/\/iso3200.org\/blog\/?page_id=5755"},"modified":"2026-07-09T17:35:49","modified_gmt":"2026-07-09T16:35:49","slug":"contax-645-af-mount-lenses","status":"publish","type":"page","link":"https:\/\/iso3200.org\/blog\/contax-645-af-mount-lenses\/","title":{"rendered":"Contax 645 AF mount lenses"},"content":{"rendered":"\n<div style=\"height:30px\" aria-hidden=\"true\" class=\"wp-block-spacer\"><\/div>\n\n\n\n<p class=\"wp-block-paragraph\">The Contax 645 AF mount is an electronic autofocus bayonet mount for the Contax 645 medium-format (6\u00d74.5) SLR system, introduced in 1999. The focal flange distance is 64mm, the throat diameter is approximately 70mm and it has four tabs. It supports autofocus and electronic aperture control and was usable with both film and digital backs.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">There is an adapter, the Leica S-Adapter C, that allows mounting Contax 645 AF lenses on Leica S camera bodies while retaining all lens functions \u2013\u200d autofocus, aperture, and central shutter control. The Contax NAM-1 adapter allows using all Contax 645 AF lenses on Contax N camera bodies, including the Contax N Digital DSLR.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">For adapting to Fujifilm GFX camera bodies, smart adapters with contacts and electronics are made by Fringer and Kipon \u2013\u200d both with no optics and with 0.8\u00d7 optics that reduce the crop factor to almost native 0.63\u00d7.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Compared to the usual 35mm format, the crop factor of Contax 645 AF-mount lenses is 0.62\u00d7.<\/p>\n\n\n\n<div style=\"height:60px\" aria-hidden=\"true\" class=\"wp-block-spacer\"><\/div>\n\n\n\n<h2 id=\"carl-zeiss-lenses\" class=\"wp-block-heading\">Carl Zeiss lenses<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">All lenses have a built-in autofocus motor.<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Carl Zeiss Distagon T* <strong>35mm F3.5<\/strong> <mark style=\"background-color:rgba(0, 0, 0, 0);color:#0693e3\" class=\"has-inline-color\">~21mm-equivalent<\/mark><\/li>\n\n\n\n<li>Carl Zeiss Distagon T* <strong>45mm F2.8<\/strong> <mark style=\"background-color:rgba(0, 0, 0, 0);color:#0693e3\" class=\"has-inline-color\">28mm-equivalent<\/mark><\/li>\n\n\n\n<li>Carl Zeiss Vario-Sonnar T* <strong>45\u201390mm F4.5<\/strong> <mark style=\"background-color:rgba(0, 0, 0, 0);color:#0693e3\" class=\"has-inline-color\">~28\u201355mm-equivalent<\/mark><\/li>\n\n\n\n<li>Carl Zeiss Distagon T* <strong>55mm F3.5<\/strong> <mark style=\"background-color:rgba(0, 0, 0, 0);color:#0693e3\" class=\"has-inline-color\">~35mm-equivalent<\/mark><\/li>\n\n\n\n<li>Carl Zeiss Planar T* <strong>80mm F2<\/strong> <mark style=\"background-color:rgba(0, 0, 0, 0);color:#0693e3\" class=\"has-inline-color\">50mm-equivalent<\/mark><\/li>\n\n\n\n<li>Carl Zeiss Apo-Makro-Planar T* <strong>120mm F4<\/strong> <mark style=\"background-color:rgba(0, 0, 0, 0);color:#0693e3\" class=\"has-inline-color\">75mm-equivalent<\/mark><\/li>\n\n\n\n<li>Carl Zeiss Sonnar T* <strong>140mm F2.8<\/strong> <mark style=\"background-color:rgba(0, 0, 0, 0);color:#0693e3\" class=\"has-inline-color\">~85mm-equivalent<\/mark><\/li>\n\n\n\n<li>Carl Zeiss Sonnar T* <strong>210mm F4<\/strong> <mark style=\"background-color:rgba(0, 0, 0, 0);color:#0693e3\" class=\"has-inline-color\">130mm-equivalent<\/mark><\/li>\n\n\n\n<li>Carl Zeiss Tele-Apotessar T* <strong>300mm F4<\/strong> <mark style=\"background-color:rgba(0, 0, 0, 0);color:#0693e3\" class=\"has-inline-color\">~210mm-equivalent<\/mark><\/li>\n<\/ul>\n\n\n\n<div style=\"height:30px\" aria-hidden=\"true\" class=\"wp-block-spacer\"><\/div>\n\n\n\n<h2 id=\"references\" class=\"wp-block-heading\">References<\/h2>\n\n\n\n<div class=\"wp-block-greenshift-blocks-toggler gs-contenttoggler gspb_toggle-id-gsbp-10fb14a\" data-height=\"5rem\"><div class=\"gs-toggler-wrapper\" id=\"gs-togglergsbp-10fb14a\" style=\"height:5rem\">\n<ul class=\"wp-block-list\">\n<li><a href=\"https:\/\/camera-wiki.org\/wiki\/Contax_645_AF\" target=\"_blank\" rel=\"noreferrer noopener nofollow\">Contax 645 AF<\/a> on Camera Wiki<\/li>\n\n\n\n<li><a href=\"https:\/\/jipvankuijk.nl\/leica-s-with-contax-645-lenses\/\" target=\"_blank\" rel=\"noreferrer noopener nofollow\">Leica S with Contax 645 lenses<\/a> on Jip van Kuijk<\/li>\n\n\n\n<li><a href=\"https:\/\/gearfocus.com\/products\/contax-nam-1-645af-lens-to-n-mount-body-adapter-1oNXP\" target=\"_blank\" rel=\"noreferrer noopener nofollow\">Contax NAM-1 645AF Lens to N-Mount Body Adapter<\/a> on GearFocus<\/li>\n\n\n\n<li><a href=\"https:\/\/www.slrlounge.com\/new-lens-adapters-for-the-fujifilm-gfx-include-a-contax-645-af-adapter\/\" target=\"_blank\" rel=\"noreferrer noopener nofollow\">New Lens Adapters for the Fujifilm GFX Include a Contax 645 AF Adapter<\/a> on SLR Lounge<\/li>\n\n\n\n<li><a href=\"https:\/\/alikgriffin.com\/kipon-baveyes-contax-645-gfx-af-0-8x-adapter-review\/\" target=\"_blank\" rel=\"noreferrer noopener nofollow\">KIPON Baveyes Contax 645-GFX AF 0.8x Adapter Review<\/a> on Alik Griffin<\/li>\n<\/ul>\n<span class=\"gs-tgl-trigger\" style=\"text-align:center;position:absolute;z-index:2;bottom:0;left:0;width:100%;color:\"><span class=\"gs-tgl-show\" tabindex=\"0\" role=\"button\" aria-label=\"Show more\" aria-controls=\"gs-togglergsbp-10fb14a\" style=\"display:block\">Show more +<\/span><span class=\"gs-tgl-hide\" tabindex=\"0\" role=\"button\" aria-label=\"Show less\" aria-controls=\"gs-togglergsbp-10fb14a\" style=\"display:none\">Show less &#8211;<\/span><\/span><span class=\"gs-tgl-grad\" style=\"background-image:linear-gradient(to bottom,rgba(255,255,255,0) 0,#ffffff 100%);display:block;position:absolute;height:100px;bottom:0;left:0;z-index:1;width:100%\"><\/span><\/div><\/div>\n\n\n\n<div style=\"height:45px\" aria-hidden=\"true\" class=\"wp-block-spacer\"><\/div>\n\n\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity is-style-wide\"\/>\n\n\n\n<p class=\"wp-block-paragraph\"><mark style=\"background-color:rgba(0, 0, 0, 0)\" class=\"has-inline-color has-vivid-green-cyan-color\">Last update: 9. 7. 2026.<\/mark><\/p>\n","protected":false},"excerpt":{"rendered":"<p>The Contax 645 AF mount is an electronic autofocus bayonet mount for the Contax 645 medium-format (6\u00d74.5) SLR system, introduced in 1999. The focal flange distance is 64mm, the throat diameter is approximately 70mm and it has four tabs. It supports autofocus and electronic aperture &hellip;<\/p>\n","protected":false},"author":2,"featured_media":0,"parent":0,"menu_order":0,"comment_status":"closed","ping_status":"closed","template":"","meta":{"_gspb_post_css":".gs-toggler-open{height:auto!important}.gs-toggler-open .gs-tgl-grad,.gs-toggler-open .gs-tgl-show{display:none!important}.gs-toggler-open .gs-tgl-hide{display:block!important}.gs-tgl-hide,.gs-tgl-show{cursor:pointer}.gs-contenttoggler *{box-sizing:border-box!important}.gs-toggler-wrapper{overflow:hidden;transition:all .5s ease;padding-bottom:35px;margin-bottom:30px;box-sizing:content-box!important;position:relative}.gs-toggler-wrapper p:last-of-type{margin-bottom:0}.gspb_toggle-id-gsbp-10fb14a .gs-tgl-trigger{font-weight:700!important}@media (max-width:991.98px){.gspb_toggle-id-gsbp-10fb14a .gs-tgl-trigger{font-weight:700!important}}@media (max-width:767.98px){.gspb_toggle-id-gsbp-10fb14a .gs-tgl-trigger{font-weight:700!important}}@media (max-width:575.98px){.gspb_toggle-id-gsbp-10fb14a .gs-tgl-trigger{font-weight:700!important}}","inline_featured_image":false,"_import_markdown_pro_load_document_selector":0,"_import_markdown_pro_submit_text_textarea":"","footnotes":""},"class_list":["post-5755","page","type-page","status-publish","hentry"],"jetpack_sharing_enabled":true,"_links":{"self":[{"href":"https:\/\/iso3200.org\/blog\/wp-json\/wp\/v2\/pages\/5755","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/iso3200.org\/blog\/wp-json\/wp\/v2\/pages"}],"about":[{"href":"https:\/\/iso3200.org\/blog\/wp-json\/wp\/v2\/types\/page"}],"author":[{"embeddable":true,"href":"https:\/\/iso3200.org\/blog\/wp-json\/wp\/v2\/users\/2"}],"replies":[{"embeddable":true,"href":"https:\/\/iso3200.org\/blog\/wp-json\/wp\/v2\/comments?post=5755"}],"version-history":[{"count":1,"href":"https:\/\/iso3200.org\/blog\/wp-json\/wp\/v2\/pages\/5755\/revisions"}],"predecessor-version":[{"id":5756,"href":"https:\/\/iso3200.org\/blog\/wp-json\/wp\/v2\/pages\/5755\/revisions\/5756"}],"wp:attachment":[{"href":"https:\/\/iso3200.org\/blog\/wp-json\/wp\/v2\/media?parent=5755"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}