So what camera are the files from ?
What does the DNG converter say when you try to open a file ?
Are you able to open them using the Canon application that came with your camera (just to make sure the files are not corrupted) ?
So what camera are the files from ?
What does the DNG converter say when you try to open a file ?
Are you able to open them using the Canon application that came with your camera (just to make sure the files are not corrupted) ?