Someone above said that itunes downsizes and compresses images for the iPhone. I believe that is not correct. In fact, I think it stores images as downsized but uncompressed bitmaps so that they respond much faster in the photo viewing app. I copied a couple thousand photos onto the phone and they should have only taken a few hundred megabytes of space. Well, they took up 1.5 GB (you read that right). I'm currently looking for evidence to prove this.
BTW, I'm also an amateur photographer and I wish images could be stored as full size jpegs on the iPhone.
EDIT:
I found the photos on the iPhone stored in /private/var/mobile/Media/Photos/Thumbs
I calculate each photo is taking an average of 640KB. If they were in fact downsized and compressed, they would be taking up much less space.
BTW, I'm also an amateur photographer and I wish images could be stored as full size jpegs on the iPhone.
EDIT:
I found the photos on the iPhone stored in /private/var/mobile/Media/Photos/Thumbs
I calculate each photo is taking an average of 640KB. If they were in fact downsized and compressed, they would be taking up much less space.