{"id":627,"date":"2020-01-16T15:11:33","date_gmt":"2020-01-16T23:11:33","guid":{"rendered":"http:\/\/historic.camera\/?p=627"},"modified":"2020-01-16T15:11:33","modified_gmt":"2020-01-16T23:11:33","slug":"f-stop-t-stops-and-even-h-stops","status":"publish","type":"post","link":"http:\/\/historic.camera\/?p=627","title":{"rendered":"F-stop, T-stops and even H-stops"},"content":{"rendered":"<p><a href=\"https:\/\/en.wikipedia.org\/wiki\/F-number\"><img data-recalc-dims=\"1\" decoding=\"async\" class=\"alignnone size-full\" src=\"https:\/\/i0.wp.com\/historic.camera\/wp-content\/uploads\/2020\/01\/1200px-Aperture_diagram.svg_.png?w=640\" alt=\"\" \/><\/a><\/p>\n<p>I&#8217;ve been reading about the differences between T-stops which are based on the measured amount of light as opposed to a calculated f\/stop, and I&#8217;ve found this wikipedia page to be super useful.\u00a0\u00a0<a href=\"https:\/\/en.wikipedia.org\/wiki\/F-number\" target=\"_blank\" rel=\"noopener noreferrer\">Wikipedia.org page on F-numbers<\/a><\/p>\n<p>Check it out as it has lots of great information including all the math formulas and other useful information\u00a0 &#8211; and btw\u00a0 \u00a0T-stops take in account the efficiency of the lens and can be different from a calculated f\/stop because most lesses only transmit about 90 or 95% of the light and sometimes even lower &#8211; down to about 60%.<\/p>\n","protected":false},"excerpt":{"rendered":"<p>I&#8217;ve been reading about the differences between T-stops which are based on the measured amount of light as opposed to a calculated f\/stop, and I&#8217;ve found this wikipedia page to be super useful.\u00a0\u00a0Wikipedia.org page on F-numbers Check it out as it has lots of great information including all the math formulas and other useful information\u00a0 &#8211; and btw\u00a0 \u00a0T-stops take in account the efficiency of the lens and can be different from a calculated f\/stop because most lesses only transmit<a class=\"entry-more\" href=\"http:\/\/historic.camera\/?p=627\">Read more<\/a><\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"_jetpack_memberships_contains_paid_content":false,"footnotes":""},"categories":[1],"tags":[284,283,287,155,286,288,285],"class_list":["post-627","post","type-post","status-publish","format-standard","hentry","category-uncategorized","tag-f-number","tag-f-stop","tag-formula","tag-lenses","tag-math","tag-reference","tag-t-stop"],"aioseo_notices":[],"jetpack_featured_media_url":"","jetpack_sharing_enabled":true,"_links":{"self":[{"href":"http:\/\/historic.camera\/index.php?rest_route=\/wp\/v2\/posts\/627","targetHints":{"allow":["GET"]}}],"collection":[{"href":"http:\/\/historic.camera\/index.php?rest_route=\/wp\/v2\/posts"}],"about":[{"href":"http:\/\/historic.camera\/index.php?rest_route=\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"http:\/\/historic.camera\/index.php?rest_route=\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"http:\/\/historic.camera\/index.php?rest_route=%2Fwp%2Fv2%2Fcomments&post=627"}],"version-history":[{"count":1,"href":"http:\/\/historic.camera\/index.php?rest_route=\/wp\/v2\/posts\/627\/revisions"}],"predecessor-version":[{"id":629,"href":"http:\/\/historic.camera\/index.php?rest_route=\/wp\/v2\/posts\/627\/revisions\/629"}],"wp:attachment":[{"href":"http:\/\/historic.camera\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=627"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"http:\/\/historic.camera\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=627"},{"taxonomy":"post_tag","embeddable":true,"href":"http:\/\/historic.camera\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=627"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}