Quote:
Originally Posted by DNSB
Hmmm... I have some trouble believing that Apple was influenced by the 4:3 ratio of books especially when I could find few physical books with that aspect ratio looking through my collection. Looking at the Wikipedia entry for books sizes, I could find none of the "standard" sizes that translated to a 4:3 aspect ratio though a couple of trade books came close. The North American letter size paper comes close but would need to be a titch taller while A4 size paper needs to be a titch shorter--21.59x28.79 for letter size, 21.0x28.0 for A4 size compared to the actual 21.59x279.4 for letter and 21.0x29.7 for A4.
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Most of my books are actually 2:3.
It's the technical books and magazines that are often letter or A4-sized and for those, 3:4 is a better fit (much smaller borders, content uses more of the display area). Aspect ratio may not matter much for reflowable content but for fixed pages, it often means less zooming and panning around required.
Letter
8.5" x 11"
iPad 9.7" 4:3
5.8" x 7.8" -> 5.8" x 7.5" -> 0.15" borders on top and bottom
10.1" 1920x1200 16:10
5.4" x 8.6" -> 5.4" x 7" -> 0.8" borders on top and bottom
10.1" 1920x1080 16:9
5" x 8.8" -> 5" x 6.5" -> 1.15" borders on top and bottom