{"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":"https:\/\/historic.camera\/?p=627","title":{"rendered":"F-stop, T-stops and even H-stops"},"content":{"rendered":"

\"\"<\/a><\/p>\n

I’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’ve found this wikipedia page to be super useful.\u00a0\u00a0Wikipedia.org page on F-numbers<\/a><\/p>\n

Check it out as it has lots of great information including all the math formulas and other useful information\u00a0 – 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 – down to about 60%.<\/p>\n","protected":false},"excerpt":{"rendered":"

I’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’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 – 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 transmitRead more<\/a><\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"_jetpack_newsletter_access":"","_jetpack_dont_email_post_to_subs":false,"_jetpack_newsletter_tier_id":0,"_jetpack_memberships_contains_paywalled_content":false,"_jetpack_feature_clip_id":0,"_jetpack_memberships_contains_paid_content":false,"footnotes":"","jetpack_post_was_ever_published":false},"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":[],"aioseo_head":"\n\t\t\n\t\n\t\n\t\n\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t