05-17-2013 07:23 PM
09-26-2014 03:30 PM
I have a 7D and a 6D. You're right, the 7D uses CF cards and the 6D uses SD cards. For each camera, I have a 128GB card and I've never been able to fill either up at any event I've video'd or photo'd.
Make sure you get a fast card, whatever you choose. There are different write-speed ratings for both CF and SD cards.