{"id":20297,"date":"2021-04-05T01:03:07","date_gmt":"2021-04-05T05:03:07","guid":{"rendered":"https:\/\/phsc.ca\/camera\/?p=20297"},"modified":"2021-04-05T01:43:05","modified_gmt":"2021-04-05T05:43:05","slug":"catching-the-wave","status":"publish","type":"post","link":"https:\/\/phsc.ca\/camera\/catching-the-wave\/","title":{"rendered":"catching the wave"},"content":{"rendered":"<div id=\"attachment_20299\" style=\"width: 235px\" class=\"wp-caption alignleft\"><a href=\"https:\/\/phsc.ca\/camera\/wp-content\/uploads\/2021\/04\/Polaroid-Elevtronics-magazine-Jan.-23-1967.jpg\"><img loading=\"lazy\" decoding=\"async\" aria-describedby=\"caption-attachment-20299\" class=\"size-full wp-image-20299\" src=\"https:\/\/phsc.ca\/camera\/wp-content\/uploads\/2021\/04\/Polaroid-Elevtronics-magazine-Jan.-23-1967-sm.jpg\" alt=\"\" width=\"225\" height=\"148\" \/><\/a><p id=\"caption-attachment-20299\" class=\"wp-caption-text\">Polaroid ad from 1967 for special ASA 10,000 film<\/p><\/div>\n<p><strong>Toronto<\/strong>. My now elderly NEX-6 boasts a maximum ISO of 25,600 (so noisy only black and white images are okay). Back in 1967, a maximum ASA (ISO) unpushed, was around ASA 400 (Tri-X). This speed was far too slow to capture very brief pulses on an <a href=\"https:\/\/en.wikipedia.org\/wiki\/Oscilloscope\">oscilloscope<\/a> (an antique laboratory device that uses a cathode ray tube (CRT) to display alternating current and pulses as wavy lines with a horizontal axis of duration (time) and vertical axis of voltage).<\/p>\n<p>Polaroid solved this dilemma by offering a super fast film\/paper of ASA 10,000 and cameras that connected to the oscilloscopes to record such brief events. Nowadays even cheap digital cameras like my old NEX-6 have sensors with ISO ratings\u00a0beyond Polaroid&#8217;s 10,000 ASA rating shown in this 1967 advertisement in their house organ.<\/p>\n<p>Thanks due to good friend and fellow member George Dunbar for alerting us about this historic Polaroid medium.<\/p>\n","protected":false},"excerpt":{"rendered":"<p>Toronto. My now elderly NEX-6 boasts a maximum ISO of 25,600 (so noisy only black and white images are okay). Back in 1967, a maximum ASA (ISO) unpushed, was around ASA 400 (Tri-X). This speed was far too slow to &hellip; <a href=\"https:\/\/phsc.ca\/camera\/catching-the-wave\/\">Continue reading <span class=\"meta-nav\">&rarr;<\/span><\/a><\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[1944],"tags":[3604,3289,2370,3605,301],"class_list":["post-20297","post","type-post","status-publish","format-standard","hentry","category-history","tag-3604","tag-asa","tag-iso","tag-oscilloscope","tag-polaroid"],"_links":{"self":[{"href":"https:\/\/phsc.ca\/camera\/wp-json\/wp\/v2\/posts\/20297","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/phsc.ca\/camera\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/phsc.ca\/camera\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/phsc.ca\/camera\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/phsc.ca\/camera\/wp-json\/wp\/v2\/comments?post=20297"}],"version-history":[{"count":4,"href":"https:\/\/phsc.ca\/camera\/wp-json\/wp\/v2\/posts\/20297\/revisions"}],"predecessor-version":[{"id":20308,"href":"https:\/\/phsc.ca\/camera\/wp-json\/wp\/v2\/posts\/20297\/revisions\/20308"}],"wp:attachment":[{"href":"https:\/\/phsc.ca\/camera\/wp-json\/wp\/v2\/media?parent=20297"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/phsc.ca\/camera\/wp-json\/wp\/v2\/categories?post=20297"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/phsc.ca\/camera\/wp-json\/wp\/v2\/tags?post=20297"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}