A digital camera is the best camera to use when beginning a career in filmmaking according to the Hollywood Reporter — specifically, a digital single-lens reflex (DSLR). The rotation of the mirror in a DSLR and its association with the digital imaging sensor makes it more desirable for film than a standard digital camera.
There are a number of brands of digital cameras available. Deciding which will best suit your needs varies upon personal taste and desired price points. One camera recommended by independent filmmakers is the Canon 5D Mark III, which replaced the Mark II. This style of camera was used to film "Act of Valor." Some additional options are the Panasonic GH3, the Nikon D800 and the Black Magic Cinema Camera.