Hi Richard, part of the reason we got the camera and housing was so our photos could be used in magazines. We have found though, that amateur fishing photography is a pleasure in itself. After you come home it's great to go through the pics from the day and re-live the experiences all over again.
The photo resolution is set at 180dpi with dimensions of 4000 x 3000 pixels -- that's around 56 x 42cm. The filesize of each pic ranges between 3.6 meg and 6.7 meg at that setting.
To upload the pics to Ausfish I reduce the width to 650 pixels and drop the resolution to 72dpi (I use Photoshop but there are plenty of other apps that do the same job). That usually puts the filesize at 40-120kb, which I figure is a good size for most people's internet connections.
Good cameras are getting cheaper all the time; if you were to buy our model now I'm sure you'd get it for cheaper than we did!