Originally Posted by Toxaris
I am sure that readers have limits with regards to size of an image due to memory, but I haven't reached it yet. The number of images should not be a problem.
Recently, as an experiment, given that there is a trend starting towards tablets and phones with higher resolution, I put a couple large images in an epub I made. Both images were large enough for a 400ppi+ display. I believe there already is a phone that either has or will have that resolution.
However, when I loaded the book on my Sony, I was dismayed to see the images not appear at all, just a blank where they were. Book was fine in ADE, and when I decreased image size to 1200 x 2048 pixels, they displayed fine again on the Sony.
So yes, I think reader devices may have some limits on image size.