{"id":18405,"date":"2020-09-22T04:20:17","date_gmt":"2020-09-22T08:20:17","guid":{"rendered":"https:\/\/phsc.ca\/camera\/?p=18405"},"modified":"2020-09-19T00:43:49","modified_gmt":"2020-09-19T04:43:49","slug":"photographica-c1925","status":"publish","type":"post","link":"https:\/\/phsc.ca\/camera\/photographica-c1925\/","title":{"rendered":"photographica c1925"},"content":{"rendered":"<div id=\"attachment_18406\" style=\"width: 235px\" class=\"wp-caption alignleft\"><a href=\"https:\/\/phsc.ca\/camera\/wp-content\/uploads\/2020\/09\/Science-Invention-July-1924.jpg\"><img loading=\"lazy\" decoding=\"async\" aria-describedby=\"caption-attachment-18406\" class=\"size-full wp-image-18406\" src=\"https:\/\/phsc.ca\/camera\/wp-content\/uploads\/2020\/09\/Science-Invention-July-1924-sm.jpg\" alt=\"\" width=\"225\" height=\"139\" \/><\/a><p id=\"caption-attachment-18406\" class=\"wp-caption-text\">f\/2 camera and bright projector of film stris c1924<\/p><\/div>\n<p><strong>Toronto<\/strong>. The magazine <em>Science &amp; Industry<\/em>\u00a0addressed the wide audience of tinkers and experimenters (mostly boys and youths) and as such it included a wide range of things. In this example article, a camera is shown, but unnamed. The take home was that it had an f\/2 lens and could snap theatre and street scenes at night under the existing light in those environments.<\/p>\n<p>The second article covers a unique projector. Again unnamed, this machine uses an &#8220;<em>ordinary car headlight bulb<\/em>&#8221; and a resistance to run on house current. Since such a bulb in 1925 took 6 volts and house current was 115 volts, the resistor would run quite hot. \u00a0The bulb is like a point source illumination so the result would be a very contrasty light. Prints were photographed on movie film and each frame could be shown separately.<\/p>\n<p>A rather tedious conversion to save the size and weight of a stereopticon projector. We had a more sophisticated projector (by SVC) when I was\u00a0a kid that showed both slides and film strips like the film used in the 1925 projector. A thank you is in order for friend George Dunbar who offered this tidbit of photographic history.<\/p>\n","protected":false},"excerpt":{"rendered":"<p>Toronto. The magazine Science &amp; Industry\u00a0addressed the wide audience of tinkers and experimenters (mostly boys and youths) and as such it included a wide range of things. In this example article, a camera is shown, but unnamed. The take home &hellip; <a href=\"https:\/\/phsc.ca\/camera\/photographica-c1925\/\">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":[2606,398,401,102,1450],"class_list":["post-18405","post","type-post","status-publish","format-standard","hentry","category-history","tag-bulb","tag-camera","tag-lens","tag-magazine","tag-projector"],"_links":{"self":[{"href":"https:\/\/phsc.ca\/camera\/wp-json\/wp\/v2\/posts\/18405","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=18405"}],"version-history":[{"count":2,"href":"https:\/\/phsc.ca\/camera\/wp-json\/wp\/v2\/posts\/18405\/revisions"}],"predecessor-version":[{"id":18409,"href":"https:\/\/phsc.ca\/camera\/wp-json\/wp\/v2\/posts\/18405\/revisions\/18409"}],"wp:attachment":[{"href":"https:\/\/phsc.ca\/camera\/wp-json\/wp\/v2\/media?parent=18405"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/phsc.ca\/camera\/wp-json\/wp\/v2\/categories?post=18405"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/phsc.ca\/camera\/wp-json\/wp\/v2\/tags?post=18405"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}