The Ins and Outs of Aspect Ratio - http://www.diyphotography.net/ins-out...
Jun 24, 2014
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A little bit of history describing how the various standard image aspect ratios came into use and how these have translated to the dimensions of modern sensors on DSLRs.
- Mark H
Good video here on History of Aspect Ratio: http://vimeo.com/68830569
- Nils Sandin