Seems like a logical

Seems like a logical selection of glass.  Thanks for sharing.  As I understand it, shooting on a cropped sensor (7D) camera with a 50mm prime lens is the equivalent of shooting with a 35mm on a full-frame camera?  Am I undersatanding this correctly?  I have a 50mm (1.4) prime and a 24-70 zoom.  What would be the  next logical lens to add to my kit for shooting videos such as this: https://vimeo.com/36258512

Thanks, in advance, for your advice.