@McCauley
If you are looking for any alt to photoshop's RAW converter, try
http://www.xnview.com/ it's been helpful to me multiple times; although they don't mention DNG on their website. Wikipedia says that DNG
http://en.wikipedia.org/wiki/Digital...file_format%29 is supported in ImageMagick.
http://www.imagemagick.org/discourse...pic.php?t=8113
http://www.adobe.com/products/dng/supporters.html