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Message: <blockquote data-quote="typo" data-source="post: 3436520" data-attributes="member: 83808">Ed,Henry, Tibias, and apparently Arek, have used a camera to attempt to record the illustrate the colour bias of binoculars. It's clearly not without it's technical difficulties, but nevertheless,  Henry and Tobias at least have shown clear differences are evident when the images are placed side by side, even though some apparently can't actually spot it when using the actual binoculars. I agree analysis of sampling and experimental error would be most useful, but so would a method to translate those spectra into a viewable colour. Clearly it's possible as the CIE point on your plots show, but unfortunately the actual parameters listed are incompatible with any colour rendering program I've found. Have you got something better?Just to add to the colour palate. Wouldn't those Swifts look brown? <img src="data:image/gif;base64,R0lGODlhAQABAIAAAAAAAP///yH5BAEAAAAALAAAAAABAAEAAAIBRAA7" class="smilie smilie--sprite smilie--sprite2" alt=";)" title="Wink    ;)" loading="lazy" data-shortname=";)" />David</blockquote>