Novice iPhone G3 user here, my 5-year old deleted several hundred photos from my phone. I had backed up my phone to my MAC two days before this happened--stupid question, where is the default location those images would be?
Did you import the photos with iPhoto if you use iPhoto for importing photos from a digital camera and from your iPhone's Camera Roll and use iPhoto for photo storage and management on your Mac, or with the Image Capture application located in your Applications folder?
Although photos in your iPhone's Camera Roll are included with your iPhone's backup which is updated by iTunes as the first step during the iTunes sync process, it isn't a good idea to depend on your iPhone's backup or on your iPhone alone for this data. Photos in the Camera Roll should be imported by your computer as with any other digital camera. You can't access this data direct from your iPhone's backup, but you can try restoring your iPhone with iTunes from your iPhone's backup. If you haven't synced your iPhone with iTunes since these photos were deleted from your iPhone, do not sync. When selecting restore, you will be prompted to update your iPhone's backup which you want to decline or these photos will be removed from your iPhone's backup when the backup is updated.