{"id":7363,"date":"2022-06-14T18:51:07","date_gmt":"2022-06-14T18:51:07","guid":{"rendered":"https:\/\/www.pmstudios.co.uk\/blog\/?p=7363"},"modified":"2022-06-14T18:51:07","modified_gmt":"2022-06-14T18:51:07","slug":"infra-red-colour-image-comparisons-for-new-lenses","status":"publish","type":"post","link":"https:\/\/www.pmstudios.co.uk\/blog\/?p=7363","title":{"rendered":"Infra-Red &#8211; Colour image comparisons for &#8216;new&#8217; lenses"},"content":{"rendered":"\n<p>I have recently bought a couple of old (film era) wide-angle lenses for my infra-red photography. One thing that interested me was comparing the images produced by the old lenses with modern lenses.  I took a photo, using a tripod, of a scene from my back garden, first using my good camera in colour, then switching cameras on the tripod to use the old lens in monochrome infra-red. I used a zoom lens to match, a close as possible, the focal length of the old lens.<\/p>\n\n\n\n<p>What surprised me was how different the distortions were between the 2 lenses &#8211; the distortions made it impossible to line them up accurately. Here are slider comparisons for the 2 lenses. First is a 24mm lens:<\/p>\n\n\n<div class=\"image-compare-viewer\" ><br>\n<img decoding=\"async\" src=\"https:\/\/www.pmstudios.co.uk\/blog\/wp-content\/uploads\/2022\/06\/F22_3128r1-aligned-600x400.jpg\" alt=\"Colour image\"><br>\n<img decoding=\"async\" src=\"https:\/\/www.pmstudios.co.uk\/blog\/wp-content\/uploads\/2022\/06\/S22_1543_24mm_850nmr1-aligned-600x400.jpg\" alt=\"IR mono image\"><br>\n<\/div>\n\n\n<p>Now I show the 21mm lens:<\/p>\n\n\n<div class=\"image-compare-viewer\" ><br>\n<img decoding=\"async\" src=\"https:\/\/www.pmstudios.co.uk\/blog\/wp-content\/uploads\/2022\/06\/F22_3125r1-aligned-600x400.jpg\" alt=\"Colour image\"><br>\n<img decoding=\"async\" src=\"https:\/\/www.pmstudios.co.uk\/blog\/wp-content\/uploads\/2022\/06\/S22_1537_21mm_950nmr1-aligned-600x400.jpg\" alt=\"IR colour\"><br>\n<\/div>\n\n\n<p>At this size the distortions are hardly noticeable but for some of the purposes I intend to use them for they would be obvious. Care is needed!<\/p>\n","protected":false},"excerpt":{"rendered":"<p>I have recently bought a couple of old (film era) wide-angle lenses for my infra-red photography. One thing that interested me was comparing the images produced by the old lenses with modern lenses. I took a photo, using a tripod, of a scene from my back garden, first using my good camera in colour, then &hellip; <a href=\"https:\/\/www.pmstudios.co.uk\/blog\/?p=7363\" class=\"more-link\">Continue reading<span class=\"screen-reader-text\"> &#8220;Infra-Red &#8211; Colour image comparisons for &#8216;new&#8217; lenses&#8221;<\/span><\/a><\/p>\n","protected":false},"author":2,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[103,126,3,94],"tags":[],"class_list":["post-7363","post","type-post","status-publish","format-standard","hentry","category-before-after","category-infra-red","category-photography","category-staffordshire"],"_links":{"self":[{"href":"https:\/\/www.pmstudios.co.uk\/blog\/index.php?rest_route=\/wp\/v2\/posts\/7363","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.pmstudios.co.uk\/blog\/index.php?rest_route=\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/www.pmstudios.co.uk\/blog\/index.php?rest_route=\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/www.pmstudios.co.uk\/blog\/index.php?rest_route=\/wp\/v2\/users\/2"}],"replies":[{"embeddable":true,"href":"https:\/\/www.pmstudios.co.uk\/blog\/index.php?rest_route=%2Fwp%2Fv2%2Fcomments&post=7363"}],"version-history":[{"count":9,"href":"https:\/\/www.pmstudios.co.uk\/blog\/index.php?rest_route=\/wp\/v2\/posts\/7363\/revisions"}],"predecessor-version":[{"id":7376,"href":"https:\/\/www.pmstudios.co.uk\/blog\/index.php?rest_route=\/wp\/v2\/posts\/7363\/revisions\/7376"}],"wp:attachment":[{"href":"https:\/\/www.pmstudios.co.uk\/blog\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=7363"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.pmstudios.co.uk\/blog\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=7363"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.pmstudios.co.uk\/blog\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=7363"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}