And since FM closes threads that are a year old leaving them out of default searches; here also is a list of RAW processors almost all of which are free to try out - usually full featured with time limitations:
It's called "A Better Finder Rename" and is currently at version eight point something. I've been using the free version for a few years now and it's pretty nice. The Graphic Converter I previewed back on page 1 will do all this as well BTW.
