[bobcdy]

I agree with Jellby that it's impossible to format an epub so that the images will fill, or almost fill, the entire ereader screen of every ereader. However, I would think that formating for the 4/3 ratio will do fine for the majority of current ereaders including the IPad (that has a close to 4/3 screen ratio). I'm surprised, however, to hear that the IPAD can't maintain a smooth photo on its screen and only shows a "wobbly" and "liquid" image (wannabee),

I also don't see why users of an ereader would object to changing the orientation of the reader to see the full photo in its correct orientation; as Dale indicated such is necessary for many image viewings in paper books.

As far as the problems with images when using Adobe DE on a computer, I guess my belief is that ADE is NOT the proper tool to use to view large images with a computer. If one needs to view epub images in detail, then it's necessary to unzip and extract the images, and view them in Photoshop or an equivalent.
Bob