{"id":9562,"date":"2011-02-18T02:18:42","date_gmt":"2011-02-18T00:18:42","guid":{"rendered":"http:\/\/ylovephoto.com\/en\/?p=9562"},"modified":"2011-02-17T08:33:11","modified_gmt":"2011-02-17T06:33:11","slug":"canon-goes-electro-optical-on-is-iii","status":"publish","type":"post","link":"https:\/\/www.ylovephoto.com\/en\/2011\/02\/18\/canon-goes-electro-optical-on-is-iii\/","title":{"rendered":"Canon goes electro-optical on IS III"},"content":{"rendered":"<p>This may be something that many people missed, but when <a href=\"http:\/\/egami.blog.so-net.ne.jp\/2011-02-14\">Egami<\/a> (a Japanese blog) produced a patent from Canon for a 300mm f\/4, the important part may not have been the possible upcoming tele-lens but the technology used in the lens to reach a better <em>Image Stabilization<\/em> (IS).<\/p>\n<p>Up to now, Canon and Nikon have been using mobile optical elements in the lens in order to compensate for the hand-shake of the photographer. This way, even if you&#8217;re not very steady, your lens will compensate your moves.<\/p>\n<figure id=\"attachment_9563\" aria-describedby=\"caption-attachment-9563\" style=\"width: 568px\" class=\"wp-caption aligncenter\"><img loading=\"lazy\" decoding=\"async\" src=\"http:\/\/ylovephoto.com\/en\/wp-content\/uploads\/2011\/02\/2011_27864_fig02.png\" alt=\"\" title=\"2011_27864_fig02\" width=\"568\" height=\"234\" class=\"size-full wp-image-9563\" srcset=\"https:\/\/www.ylovephoto.com\/en\/wp-content\/uploads\/2011\/02\/2011_27864_fig02.png 568w, https:\/\/www.ylovephoto.com\/en\/wp-content\/uploads\/2011\/02\/2011_27864_fig02-300x123.png 300w, https:\/\/www.ylovephoto.com\/en\/wp-content\/uploads\/2011\/02\/2011_27864_fig02-480x197.png 480w, https:\/\/www.ylovephoto.com\/en\/wp-content\/uploads\/2011\/02\/2011_27864_fig02-235x96.png 235w, https:\/\/www.ylovephoto.com\/en\/wp-content\/uploads\/2011\/02\/2011_27864_fig02-75x30.png 75w, https:\/\/www.ylovephoto.com\/en\/wp-content\/uploads\/2011\/02\/2011_27864_fig02-350x144.png 350w, https:\/\/www.ylovephoto.com\/en\/wp-content\/uploads\/2011\/02\/2011_27864_fig02-220x90.png 220w, https:\/\/www.ylovephoto.com\/en\/wp-content\/uploads\/2011\/02\/2011_27864_fig02-150x61.png 150w\" sizes=\"auto, (max-width: 568px) 100vw, 568px\" \/><figcaption id=\"caption-attachment-9563\" class=\"wp-caption-text\">Canon 300mm f\/4 patent<\/figcaption><\/figure>\n<p>But the problem with mechanical image stabilization is that it&#8217;s limited by mechanical inertia. You cannot shake a lens block as fast as you&#8217;d want. This is perfectly OK for photographer shake (usually under 10 Hz) and it is adequate for vibrations on a tripod (under 40-50 Hz) if you use a really light mobile element. But it becomes tough when you want to correct easily tripod vibrations or even in-vehicle vibrations (usually 10 Hz to 500 Hz).<\/p>\n<p>This is where electro-optical elements come in (and it&#8217;s not to be understood as Electro-Optical System or EOS). This is an optical element whose optical index can change under electrical voltage. In the patent drawing, you&#8217;ll notice that eo1\/eo2\/3d is a flat element (pressed between two electrodes). The major advantage of electro-optical elements is that the maximum frequency may be very high (probably up into the 1000&#8217;s of Hz).<\/p>\n<p>With this kind of technology (already seen in other less precise patents), Canon could be preparing a third-generation IS able to adapt easily to tripods (not only accepting to leave IS on when using the lens on a tripod, but correcting in-car or in-plane shakes).<\/p>\n","protected":false},"excerpt":{"rendered":"<p>This may be something that many people missed, but when Egami (a Japanese blog) produced a patent from Canon for a 300mm f\/4, the important part may not have been the possible upcoming tele-lens but the technology used in the lens to reach a better Image Stabilization (IS). Up to now, Canon and Nikon have [&hellip;]<\/p>\n","protected":false},"author":1,"featured_media":9563,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[23,49],"tags":[639,132,239,95],"class_list":["post-9562","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-canon-accessories-lenses","category-technology","tag-canon","tag-lens","tag-patent","tag-rumour"],"_links":{"self":[{"href":"https:\/\/www.ylovephoto.com\/en\/wp-json\/wp\/v2\/posts\/9562","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.ylovephoto.com\/en\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/www.ylovephoto.com\/en\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/www.ylovephoto.com\/en\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/www.ylovephoto.com\/en\/wp-json\/wp\/v2\/comments?post=9562"}],"version-history":[{"count":0,"href":"https:\/\/www.ylovephoto.com\/en\/wp-json\/wp\/v2\/posts\/9562\/revisions"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/www.ylovephoto.com\/en\/wp-json\/wp\/v2\/media\/9563"}],"wp:attachment":[{"href":"https:\/\/www.ylovephoto.com\/en\/wp-json\/wp\/v2\/media?parent=9562"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.ylovephoto.com\/en\/wp-json\/wp\/v2\/categories?post=9562"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.ylovephoto.com\/en\/wp-json\/wp\/v2\/tags?post=9562"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}