Good point, Jack. I originally saw the 1/320 and ISO 320 and got confused over focal length, but you're spot on!! Not that ISO 320 would do much to effect the clarity on the D610, but the fastest he'd need to shoot with that lens is 1/70, so he should be able to shoot at ISO 100. I'm guessing Auto ISO as well, or it may have been set previously and not changed.
CAM, your EXIF data is going to get stripped anytime the software has to resize your image (Grrrrrrr), so if you are uploading then resize to a max of 1000px on the long side and it will preserve your EXIF data for us to view.