{"id":5337,"date":"2014-07-10T09:38:00","date_gmt":"2014-07-10T08:38:00","guid":{"rendered":"http:\/\/amateurphotographer.co.uk\/uncategorized\/our-graphs-explained-5337"},"modified":"2014-09-02T12:10:47","modified_gmt":"2014-09-02T11:10:47","slug":"our-graphs-explained","status":"publish","type":"post","link":"https:\/\/other.kelsey.host\/amateurphotographer\/specials\/our-graphs-explained\/","title":{"rendered":"Our graphs explained"},"content":{"rendered":"<h2>Resolution<\/h2>\n<p><img decoding=\"async\" src=\"http:\/\/keyassets.timeincuk.net\/inspirewp\/live\/wp-content\/uploads\/sites\/12\/2014\/07\/Our_graphs_resolution.jpg\" border=\"0\"><\/img><\/p>\n<p>The MTF resolution chart shows clarity on the vertical axes and the number of line pairs per picture height (lp\/ph) on the horizontal. As the lp\/ph increases, the lens is less able to define them, hence the typical downward curve of an MTF chart.<\/p>\n<h2>Shading<\/h2>\n<p><img decoding=\"async\" src=\"http:\/\/keyassets.timeincuk.net\/inspirewp\/live\/wp-content\/uploads\/sites\/12\/2014\/07\/Our_graphs_shading.jpg\" border=\"0\"><\/img><\/p>\n<p>To show vignetting, we use a 3D rendering. The brightest part of the lens, in the centre, is measured at 0EV. As the edges get darker, the corners drop, representing the scale of the darkening. A 1EV difference in brightness is shown in red. <\/p>\n<h2>Curvilinear distortion<\/h2>\n<p><img decoding=\"async\" src=\"http:\/\/keyassets.timeincuk.net\/inspirewp\/live\/wp-content\/uploads\/sites\/12\/2014\/07\/Our_graphs_curvilinear_distortion.jpg\" border=\"0\"><\/img><\/p>\n<p>The red arrows on the distortion grid show the direction and strength of the shift in the image, compared to the original point on the photographed chart. The Mean and Max values are given to show the average and worst point shift as a percentage value.<\/p>\n<p><img decoding=\"async\" src=\"http:\/\/keyassets.timeincuk.net\/inspirewp\/live\/wp-content\/uploads\/sites\/12\/2014\/07\/Image_Engineering_logo_s.jpg\" border=\"0\" hspace=\"5\" align=\"right\" class=\" alignright\"><\/img><\/p>\n<p>Our cameras and lenses are tested using the industry-standard Image Engineering IQ-Analyser software. Visit <a href=\"http:\/\/www.image-engineering.de\" target=\"_blank\">www.image-engineering.de<\/a> for more details.<\/p>\n","protected":false},"excerpt":{"rendered":"<p>Our graphs explained<\/p>\n","protected":false},"author":323,"featured_media":5338,"comment_status":"open","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"_acf_changed":false,"_jetpack_memberships_contains_paid_content":false,"footnotes":""},"categories":[124],"tags":[],"product-category":[],"class_list":["post-5337","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-specials"],"yoast_head":"<!-- This site is optimized with the Yoast SEO Premium plugin v26.8 (Yoast SEO v26.8) - https:\/\/yoast.com\/product\/yoast-seo-premium-wordpress\/ -->\n<title>Our graphs explained - Amateur Photographer<\/title>\n<meta name=\"description\" content=\"Our graphs explained\" \/>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"https:\/\/other.kelsey.host\/amateurphotographer\/specials\/our-graphs-explained\/\" \/>\n<meta property=\"og:locale\" content=\"en_US\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"Our graphs explained\" \/>\n<meta property=\"og:description\" content=\"Our graphs explained\" \/>\n<meta property=\"og:url\" content=\"https:\/\/other.kelsey.host\/amateurphotographer\/specials\/our-graphs-explained\/\" \/>\n<meta property=\"og:site_name\" content=\"Amateur Photographer\" \/>\n<meta property=\"article:publisher\" content=\"http:\/\/www.facebook.com\/Amateur.photographer.magazine\" \/>\n<meta property=\"article:published_time\" content=\"2014-07-10T08:38:00+00:00\" \/>\n<meta property=\"article:modified_time\" content=\"2014-09-02T11:10:47+00:00\" \/>\n<meta property=\"og:image\" content=\"https:\/\/other.kelsey.host\/amateurphotographer\/wp-content\/uploads\/sites\/16\/2014\/07\/Our_graphs_resolution.jpg\" \/>\n\t<meta property=\"og:image:width\" content=\"600\" \/>\n\t<meta property=\"og:image:height\" content=\"484\" \/>\n\t<meta property=\"og:image:type\" content=\"image\/jpeg\" \/>\n<meta name=\"author\" content=\"Rosee Woodland\" \/>\n<meta name=\"twitter:card\" content=\"summary_large_image\" \/>\n<meta name=\"twitter:creator\" content=\"@AP_Magazine\" \/>\n<meta name=\"twitter:site\" content=\"@AP_Magazine\" \/>\n<meta name=\"twitter:label1\" content=\"Written by\" \/>\n\t<meta name=\"twitter:data1\" content=\"Rosee Woodland\" \/>\n\t<meta name=\"twitter:label2\" content=\"Est. reading time\" \/>\n\t<meta name=\"twitter:data2\" content=\"1 minute\" \/>\n<script type=\"application\/ld+json\" class=\"yoast-schema-graph\">{\"@context\":\"https:\/\/schema.org\",\"@graph\":[{\"@type\":\"Article\",\"@id\":\"https:\/\/other.kelsey.host\/amateurphotographer\/specials\/our-graphs-explained\/#article\",\"isPartOf\":{\"@id\":\"https:\/\/other.kelsey.host\/amateurphotographer\/specials\/our-graphs-explained\/\"},\"author\":{\"name\":\"Rosee Woodland\",\"@id\":\"https:\/\/other.kelsey.host\/amateurphotographer\/#\/schema\/person\/f95a396031978ed0ea69236f11b520a5\"},\"headline\":\"Our graphs explained\",\"datePublished\":\"2014-07-10T08:38:00+00:00\",\"dateModified\":\"2014-09-02T11:10:47+00:00\",\"mainEntityOfPage\":{\"@id\":\"https:\/\/other.kelsey.host\/amateurphotographer\/specials\/our-graphs-explained\/\"},\"wordCount\":163,\"commentCount\":0,\"image\":{\"@id\":\"https:\/\/other.kelsey.host\/amateurphotographer\/specials\/our-graphs-explained\/#primaryimage\"},\"thumbnailUrl\":\"https:\/\/other.kelsey.host\/amateurphotographer\/wp-content\/uploads\/sites\/16\/2014\/07\/Our_graphs_resolution.jpg\",\"articleSection\":[\"Specials\"],\"inLanguage\":\"en-US\"},{\"@type\":\"WebPage\",\"@id\":\"https:\/\/other.kelsey.host\/amateurphotographer\/specials\/our-graphs-explained\/\",\"url\":\"https:\/\/other.kelsey.host\/amateurphotographer\/specials\/our-graphs-explained\/\",\"name\":\"Our graphs explained - 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