{"id":4021,"date":"2012-04-01T17:58:45","date_gmt":"2012-04-02T00:58:45","guid":{"rendered":"http:\/\/vernabob.com\/blog\/2012\/04\/01\/preparing-to-photograph-the-eclipse\/"},"modified":"2012-04-02T18:08:09","modified_gmt":"2012-04-03T01:08:09","slug":"preparing-to-photograph-the-eclipse","status":"publish","type":"post","link":"http:\/\/vernabob.com\/blog\/2012\/04\/01\/preparing-to-photograph-the-eclipse\/","title":{"rendered":"Preparing to Photograph the Eclipse"},"content":{"rendered":"<p><a href='http:\/\/vernabob.com\/graphics\/imageview.php?image=http:\/\/vernabob.com\/blog\/wp-content\/uploads\/2012\/04\/filter.jpg' title='filter.jpg'><img src='http:\/\/vernabob.com\/blog\/wp-content\/uploads\/2012\/04\/filter.jpg' alt='filter.jpg' width='320' class='left' \/><\/a>I ordered some <a href=\"http:\/\/www.rainbowsymphonystore.com\/solar-filters.html\">solar filters<\/a> for all of our cameras so we can try to get images of the <a href=\"http:\/\/capnbob.us\/blog\/2012\/03\/03\/2012-annular-eclipse-trip-update\/\">annular solar eclipse in May<\/a>. The filters aren&#8217;t very substantial since they are made with cardboard tubing and have polymer filters, but they are cost-effective (~$10 each) and they work. <\/p>\n<p><em>Image: Solar filter over Canon SX-40 with inset of solar photo I took &#8211; click to enlarge<\/em><\/p>\n<p>The filters come with an adhesive felt liner that you install to allow a snug fit when you slip the filter over the objective lens of the camera. Once installed, the filter doesn&#8217;t interfere with the auto-focus mechanisms nor with any other camera function.<\/p>\n<p>After some experimentation, I found that trying to use the cameras in auto modes (other than auto-focus) does not give good results; camera motion would blur most images. I tried using a tripod, but getting the image centered in the camera was taking too long. The eclipse would be over before getting all the proper adjustments.<\/p>\n<p>I finally settled on using the camera in manual mode where you can independently set the film speed, aperture and shutter speed. I settled on <strong>ISO 3200<\/strong> film speed, <strong>F5.6<\/strong> for the aperture and <strong>1\/1250<\/strong> second shutter speed. Holding the camera in my hands, the image was good enough to resolve <a href=\"http:\/\/sohowww.nascom.nasa.gov\/sunspots\/\">sunspot 1445<\/a> currently transiting the solar surface. I uploaded a <a href='http:\/\/vernabob.com\/graphics\/imageview.php?image=http:\/\/vernabob.com\/blog\/wp-content\/uploads\/2012\/04\/sol.jpg' title='large image of the sun'>large image of the sun<\/a> to the image viewer. Click on the link to view.<\/p>\n","protected":false},"excerpt":{"rendered":"<p>I ordered some solar filters for all of our cameras so we can try to get images of the annular solar eclipse in May. The filters&#46;&#46;&#46;<\/p>\n","protected":false},"author":11,"featured_media":0,"comment_status":"open","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[9,3,34],"tags":[],"class_list":["post-4021","post","type-post","status-publish","format-standard","hentry","category-nerd-stuff","category-photography","category-retirement"],"_links":{"self":[{"href":"http:\/\/vernabob.com\/blog\/wp-json\/wp\/v2\/posts\/4021","targetHints":{"allow":["GET"]}}],"collection":[{"href":"http:\/\/vernabob.com\/blog\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"http:\/\/vernabob.com\/blog\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"http:\/\/vernabob.com\/blog\/wp-json\/wp\/v2\/users\/11"}],"replies":[{"embeddable":true,"href":"http:\/\/vernabob.com\/blog\/wp-json\/wp\/v2\/comments?post=4021"}],"version-history":[{"count":0,"href":"http:\/\/vernabob.com\/blog\/wp-json\/wp\/v2\/posts\/4021\/revisions"}],"wp:attachment":[{"href":"http:\/\/vernabob.com\/blog\/wp-json\/wp\/v2\/media?parent=4021"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"http:\/\/vernabob.com\/blog\/wp-json\/wp\/v2\/categories?post=4021"},{"taxonomy":"post_tag","embeddable":true,"href":"http:\/\/vernabob.com\/blog\/wp-json\/wp\/v2\/tags?post=4021"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}