{"id":31238,"date":"2025-04-17T01:03:45","date_gmt":"2025-04-17T05:03:45","guid":{"rendered":"https:\/\/phsc.ca\/camera\/?p=31238"},"modified":"2025-04-17T12:36:38","modified_gmt":"2025-04-17T16:36:38","slug":"blink-of-an-eye","status":"publish","type":"post","link":"https:\/\/phsc.ca\/camera\/blink-of-an-eye\/","title":{"rendered":"blink of an eye"},"content":{"rendered":"
\"\"<\/a>

a c1895 UNICUM shutter on a POCO camera. Included is a Rapid Rectilinear lens.<\/p><\/div>\n

Toronto<\/strong>. Up until dry plates<\/a> became common, camera shutters were simply unnecessary. Timing could be easily set by holding something like a dark hat over the lens then briefly removing and replacing it.<\/p>\n

Once dry plates and later film became established, sub-second exposures in bright light became common and shutters began to appear on cameras. A typical shutter is the UNICUM shown at left. The shutter usually surrounded a lens like the Rapid Rectilinear shown here.<\/p>\n

This shutter was provided on a c1895 POCO glass plate camera (sans the name button). Other versions of the UNICUM are engraved as ‘Bausch & Lomb’ around the speed setting dial. UNICUM shutters appeared from a decade or two before 1900 to a couple of decades after. The Bausch & Lomb engraving showed up shortly before the year 1900 as far as I can tell. The linked page in line one above includes a Rochester Camera & Supply Co. catalogue (POCO<\/a> link on the linked page. That link is repeated for your convenience).<\/p>\n

Visit our PHSC EVENTS (see list at right). Lots of items for your collection will be shown – possibly a POCO camera or a UNICUM shutter! \u00a0Next up is our spring auction on May 4th – in about three weeks from now.<\/p>\n

 <\/p>\n","protected":false},"excerpt":{"rendered":"

Toronto. Up until dry plates became common, camera shutters were simply unnecessary. Timing could be easily set by holding something like a dark hat over the lens then briefly removing and replacing it. Once dry plates and later film became … Continue reading →<\/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":[399,398,675,401,679],"class_list":["post-31238","post","type-post","status-publish","format-standard","hentry","category-history","tag-auction","tag-camera","tag-events","tag-lens","tag-shutter"],"_links":{"self":[{"href":"https:\/\/phsc.ca\/camera\/wp-json\/wp\/v2\/posts\/31238","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=31238"}],"version-history":[{"count":5,"href":"https:\/\/phsc.ca\/camera\/wp-json\/wp\/v2\/posts\/31238\/revisions"}],"predecessor-version":[{"id":31262,"href":"https:\/\/phsc.ca\/camera\/wp-json\/wp\/v2\/posts\/31238\/revisions\/31262"}],"wp:attachment":[{"href":"https:\/\/phsc.ca\/camera\/wp-json\/wp\/v2\/media?parent=31238"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/phsc.ca\/camera\/wp-json\/wp\/v2\/categories?post=31238"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/phsc.ca\/camera\/wp-json\/wp\/v2\/tags?post=31238"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}