{"id":5281,"date":"2024-08-26T01:51:46","date_gmt":"2024-08-26T01:51:46","guid":{"rendered":"https:\/\/beamq.com\/laser\/?p=5281"},"modified":"2024-08-26T01:51:46","modified_gmt":"2024-08-26T01:51:46","slug":"effective-focal-length-efl","status":"publish","type":"post","link":"https:\/\/beamq.com\/laser\/effective-focal-length-efl\/","title":{"rendered":"Effective focal length EFL"},"content":{"rendered":"\n<p>By definition, the effective focal length EFL is the distance between the rear principal point P&#8217;, and the rear focal point F&#8217; of the lens. The back focal length BFL is the distance between the rear vertex V&#8217; of the lens, and the rear focal point F&#8217;.<\/p>\n\n\n\n<div class=\"wp-block-file\"><a href=\"https:\/\/beamq.com\/laser\/wp-content\/uploads\/2024\/08\/Methods-for-measuring-a-lens-focal-length.pdf\">Methods-for-measuring-a-lens-focal-length<\/a><a href=\"https:\/\/beamq.com\/laser\/wp-content\/uploads\/2024\/08\/Methods-for-measuring-a-lens-focal-length.pdf\" class=\"wp-block-file__button\" download>Download<\/a><\/div>\n","protected":false},"excerpt":{"rendered":"<p>By definition, the effective focal length EFL is the distance between the rear principal point P&#8217;, and the rear focal point F&#8217; of the lens. The back focal length BFL is the distance between the rear vertex V&#8217; of the lens, and the rear focal point F&#8217;.<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":[],"categories":[1],"tags":[],"_links":{"self":[{"href":"https:\/\/beamq.com\/laser\/wp-json\/wp\/v2\/posts\/5281"}],"collection":[{"href":"https:\/\/beamq.com\/laser\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/beamq.com\/laser\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/beamq.com\/laser\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/beamq.com\/laser\/wp-json\/wp\/v2\/comments?post=5281"}],"version-history":[{"count":1,"href":"https:\/\/beamq.com\/laser\/wp-json\/wp\/v2\/posts\/5281\/revisions"}],"predecessor-version":[{"id":5283,"href":"https:\/\/beamq.com\/laser\/wp-json\/wp\/v2\/posts\/5281\/revisions\/5283"}],"wp:attachment":[{"href":"https:\/\/beamq.com\/laser\/wp-json\/wp\/v2\/media?parent=5281"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/beamq.com\/laser\/wp-json\/wp\/v2\/categories?post=5281"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/beamq.com\/laser\/wp-json\/wp\/v2\/tags?post=5281"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}