i hadn’t done the math, but my buddy David Briggs has. he explains why the 7D is actually better than the 5D mkII for filmmakers looking to recreate the motion picture film experience.
“If you believe the image sensor in the 5d mark ii is similar in size to a frame of film from a 35mm motion picture camera like a Panavison or Arricam, you are wrong! Since Canon and Nikon are primarily coming from the still photography world, their understanding of “full frame” and “1.6x cropped” need to be understood in motion picture terms.
There is some translation involved in order to understand sensor size as it relates to motion pictures. From this point forward when we use the phrase “full frame” it will be understood in still photography terms.”
be sure and check out the Abel Cine links at the bottom of his post. and if you need to rent car mounts for your shoot, check out David’s rental company — ProRigs.