An innovation that changed an industry, the full-frame 21-megapixel 5D Mark II was the first DSLR to feature full HD (1080p) video recording. Filmmakers quickly adopted the cheaper alternative to conventional and expensive interchangeable-lens cameras that film studios use. An episode of Fox's popular medical drama House was filmed entirely with the 5D Mark II, and it was the first digital camera used to take the official U.S. presidential portrait.