{"id":768,"date":"2019-04-01T19:11:50","date_gmt":"2019-04-01T19:11:50","guid":{"rendered":"https:\/\/pleaseleavequietly.net\/?p=768"},"modified":"2019-04-01T19:14:29","modified_gmt":"2019-04-01T19:14:29","slug":"mamiya-645-lens-equivalents","status":"publish","type":"post","link":"https:\/\/pleaseleavequietly.net\/?p=768","title":{"rendered":"Mamiya 645 Lens Equivalents"},"content":{"rendered":"\n<p>I have a Mamiya M645 SUPER medium format camera. I have had it for a while, probably about 8 years or so. Its in pretty good condition, and fully functional. One thing that I keep forgetting is the lens conversion factors between medium format and 35mm. I intuitively know what the 35mm lengths mean now so it is useful to be able to convert.<\/p>\n\n\n\n<p>So a 645 medium format camera has a negative area of 56 x 41.5mm, which is 2.6 times the area of a (full-frame) 35mm at 36 x 24mm. This is a crop factor of 0.62075x. So the equivalent length are lower.<\/p>\n\n\n\n<p>The chart of lengths is as follows:<\/p>\n\n\n\n<table class=\"wp-block-table\"><tbody><tr><td><strong>645 Lens<\/strong><\/td><td><strong>35mm Equivalent<\/strong><\/td><td><strong>645 Lens\ufeff<\/strong><\/td><td><strong>35mm Equivalent<\/strong><\/td><\/tr><tr><td>35mm<\/td><td>21mm<\/td><td>140mm<\/td><td>87mm<\/td><\/tr><tr><td>45mm<\/td><td>28mm<\/td><td>150mm<\/td><td>90mm<\/td><\/tr><tr><td>55mm<\/td><td>35mm<\/td><td>200mm<\/td><td>125mm<\/td><\/tr><tr><td>75mm<\/td><td>45mm<\/td><td>300mm<\/td><td>180mm<\/td><\/tr><tr><td>80mm<\/td><td>50mm<\/td><td>400mm<\/td><td>250mm<\/td><\/tr><tr><td>120mm<\/td><td>75mm<\/td><td>600mm<\/td><td>375mm<\/td><\/tr><tr><td>135mm<\/td><td>85mm<\/td><td><\/td><td><\/td><\/tr><\/tbody><\/table>\n\n\n\n<p>The spread of lens I have now is good, from a standard equivalent 50mm, a 35mm equivalent, and a 28mm equivalent. The 35mm length is one of my favourites for photography, and it is also nice to have the wide angle. I would love a 90mm equivalent (150mm) for portrait work. I will keep an eye on eBay for one of the those.<\/p>\n\n\n\n<figure class=\"wp-block-image\"><img loading=\"lazy\" decoding=\"async\" width=\"432\" height=\"324\" src=\"https:\/\/pleaseleavequietly.net\/wp-content\/uploads\/2019\/04\/IMG_20190401_200312.jpg\" alt=\"\" class=\"wp-image-770\"\/><figcaption>My Mamiya M645 SUPER and the three lens, 80mm, 55mm, and a 45mm.<\/figcaption><\/figure>\n","protected":false},"excerpt":{"rendered":"","protected":false},"author":2,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[7,12],"tags":[72,71,74,64,65],"class_list":["post-768","post","type-post","status-publish","format-standard","hentry","category-kit-posts","category-tips","tag-35mm","tag-cameras","tag-equivalents","tag-lens","tag-medium-format"],"_links":{"self":[{"href":"https:\/\/pleaseleavequietly.net\/index.php?rest_route=\/wp\/v2\/posts\/768","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/pleaseleavequietly.net\/index.php?rest_route=\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/pleaseleavequietly.net\/index.php?rest_route=\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/pleaseleavequietly.net\/index.php?rest_route=\/wp\/v2\/users\/2"}],"replies":[{"embeddable":true,"href":"https:\/\/pleaseleavequietly.net\/index.php?rest_route=%2Fwp%2Fv2%2Fcomments&post=768"}],"version-history":[{"count":2,"href":"https:\/\/pleaseleavequietly.net\/index.php?rest_route=\/wp\/v2\/posts\/768\/revisions"}],"predecessor-version":[{"id":772,"href":"https:\/\/pleaseleavequietly.net\/index.php?rest_route=\/wp\/v2\/posts\/768\/revisions\/772"}],"wp:attachment":[{"href":"https:\/\/pleaseleavequietly.net\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=768"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/pleaseleavequietly.net\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=768"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/pleaseleavequietly.net\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=768"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}