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<blockquote data-quote="Andy Smith" data-source="post: 1662" data-attributes="member: 20"><p>I would have the camera on a tripod TMG1961, and if the subject is focused when in the centre of the image you will not need to change focus when you move the camera to place it in the corners. Each corner should have the same quality, but if you re-focus for each corner you are going to get inaccurate results.</p><p>A better explanation of the method is here:</p><p>[URL unfurl="true"]https://phillipreeve.net/blog/how-to-check-how-decentered-your-lens-is/[/URL]</p><p></p><p>There are a few different approaches really, so you could follow this one which will do the same job, and uses indoor and outdoor images for testing.</p><p>[MEDIA=youtube]qbgo_zE20Gg:1165[/MEDIA]</p></blockquote><p></p>
[QUOTE="Andy Smith, post: 1662, member: 20"] I would have the camera on a tripod TMG1961, and if the subject is focused when in the centre of the image you will not need to change focus when you move the camera to place it in the corners. Each corner should have the same quality, but if you re-focus for each corner you are going to get inaccurate results. A better explanation of the method is here: [URL unfurl="true"]https://phillipreeve.net/blog/how-to-check-how-decentered-your-lens-is/[/URL] There are a few different approaches really, so you could follow this one which will do the same job, and uses indoor and outdoor images for testing. [MEDIA=youtube]qbgo_zE20Gg:1165[/MEDIA] [/QUOTE]
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