{"id":760,"date":"2009-10-06T03:34:50","date_gmt":"2009-10-06T03:34:50","guid":{"rendered":"http:\/\/ethanjhulbert.org\/photo\/?p=760"},"modified":"2025-03-31T08:15:51","modified_gmt":"2025-03-31T08:15:51","slug":"infrared-vision","status":"publish","type":"post","link":"https:\/\/www.ethanjhulbert.org\/photo\/2009\/infrared-vision\/","title":{"rendered":"Infrared Vision: October 2009"},"content":{"rendered":"

In October, I learned that digital cameras pick up infrared light – light in a color we can’t see. This blew my mind. It still does. I discovered I could make a homemade infrared filter out of nothing but a shortened cardboard paper towel tube and a couple layers of exposed film. I had plenty of that lying around in film school! It was opaque to my eye, but let only infrared light pass through to the camera lens.<\/p>\n

The following photos are a sample of my experimentation with a consumer digital camera (a Canon PowerShot<\/a>) and the homemade infrared filter<\/a>, getting the lens to focus correctly through it, capturing the light in the best ways possible, and slowly gaining proficiency. 10\/4\/2009 – 10\/6\/2009.<\/p>\n

\"A<\/a>

the only photo here not through the filter. ordinary tv remote.<\/p><\/div>\n

\"An<\/a>

first shot out my window through the filter<\/p><\/div>\n

\"A<\/a>

color experimentation<\/p><\/div>\n

\"Another<\/a>

speed experimentation<\/p><\/div>\n

\"An<\/a>

plant tissue reflects infrared light especially well. taking photos of plants is a good way to see how well the filter works.<\/p><\/div>\n

\"An<\/a><\/p>\n

\"Another<\/a>

getting better<\/p><\/div>\n

\"A<\/a>

sunlight contains a broad spectrum of all colors, including plenty of infrared<\/p><\/div>\n

\"An<\/a>

this is a dark green tree<\/p><\/div>\n

\"A<\/a><\/p>\n

\"A<\/a>

this is a line of grubby little dark brown and green weeds in a sidewalk crack<\/p><\/div>\n

\"A<\/a> \"A<\/a> \"A<\/a> \"A<\/a> \"An<\/a><\/p>\n

\"The<\/a>

the white layer is dark green grass<\/p><\/div>\n

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

In October, I learned that digital cameras pick up infrared light – light in a color we can’t see. This blew my mind. It still does. I discovered I could make a homemade infrared filter out of nothing but a shortened cardboard paper towel tube and a couple layers of exposed film. I had plenty …<\/p>\n","protected":false},"author":2,"featured_media":781,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[6,12],"tags":[],"class_list":["post-760","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-canon-powershot","category-infrared-filter"],"aioseo_notices":[],"_links":{"self":[{"href":"https:\/\/www.ethanjhulbert.org\/photo\/wp-json\/wp\/v2\/posts\/760","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.ethanjhulbert.org\/photo\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/www.ethanjhulbert.org\/photo\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/www.ethanjhulbert.org\/photo\/wp-json\/wp\/v2\/users\/2"}],"replies":[{"embeddable":true,"href":"https:\/\/www.ethanjhulbert.org\/photo\/wp-json\/wp\/v2\/comments?post=760"}],"version-history":[{"count":7,"href":"https:\/\/www.ethanjhulbert.org\/photo\/wp-json\/wp\/v2\/posts\/760\/revisions"}],"predecessor-version":[{"id":2237,"href":"https:\/\/www.ethanjhulbert.org\/photo\/wp-json\/wp\/v2\/posts\/760\/revisions\/2237"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/www.ethanjhulbert.org\/photo\/wp-json\/wp\/v2\/media\/781"}],"wp:attachment":[{"href":"https:\/\/www.ethanjhulbert.org\/photo\/wp-json\/wp\/v2\/media?parent=760"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.ethanjhulbert.org\/photo\/wp-json\/wp\/v2\/categories?post=760"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.ethanjhulbert.org\/photo\/wp-json\/wp\/v2\/tags?post=760"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}