Originally Posted by JSWolf
So if we use 320x480 aspect ratio images at the largest size, then it'll work for all three devices. Would that be correct then?
I haven't tried this but it should work if you use as the largest size:
[*] Max. usable: 397 x 595 or
[*] Max. practical: 393 x 590
. (better as avoids bleeding into the edge of the device and accomodates a 2px margin per DaleDe's suggestion)
The eBook Publisher then can "automatically" resize it to fit the devices' max. usable dimensions WHILE preserving the aspect ratio 320/480 or 0.667.
Great Idea, Jon!
p.s. likewise for other devices this would be:
[*] Amazon Kindle: Max. usable: 427 x 640 (and Cybook Gen 3)
[*] iRex iLiad: Max. usable: 623 x 935
[*] Sony PRS500: Max. usable: 502 x 753
[*] Sony PRS505: Max. usable: 512 x 768
So, in the end, the largest size for the 320x480 aspect ratio should be 623 x 935 (or rounding to 620 x 930
) This would especially be useful for cover images!!!