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<blockquote data-quote="WayneF" data-source="post: 326984" data-attributes="member: 12496">Actually, if you step back to fill the frame the same, what you are comparing is perspective.&nbsp; Portraits ought to always stand back at least maybe six or seven feet.Here is one:&nbsp;&nbsp; <a href="http://stepheneastwood.com/tutorials/Tutorials_Lens_Perspective.htm" target="_blank">Stephen Eastwood|Beauty and Fashion Photographer | Tutorials</a>If you adjust distance to fill the frame the same with the subjects head, sure, the background might still show differences, because it was the head, not the background, that was adjusted to be same magnification size.There are a lot of DOF demonstrations on the web, and I'd guess most are correct (except Cambridge is full of it sometimes. <img src="data:image/gif;base64,R0lGODlhAQABAIAAAAAAAP///yH5BAEAAAAALAAAAAABAAEAAAIBRAA7" class="smilie smilie--sprite smilie--sprite1" alt=":)" title="Smile&nbsp; &nbsp; :)" loading="lazy" data-shortname=":)" /> )Everyone knows about the three factors. This has been known for at least 100 years.</blockquote>

[QUOTE="WayneF, post: 326984, member: 12496"] Actually, if you step back to fill the frame the same, what you are comparing is perspective. Portraits ought to always stand back at least maybe six or seven feet. Here is one: [URL="http://stepheneastwood.com/tutorials/Tutorials_Lens_Perspective.htm"]Stephen Eastwood|Beauty and Fashion Photographer | Tutorials[/URL] If you adjust distance to fill the frame the same with the subjects head, sure, the background might still show differences, because it was the head, not the background, that was adjusted to be same magnification size. There are a lot of DOF demonstrations on the web, and I'd guess most are correct (except Cambridge is full of it sometimes. :) ) Everyone knows about the three factors. This has been known for at least 100 years. [/QUOTE]

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