In a departure from its last introduction as dramatic as the C300's Hollywood launch itself, Canon has quietly announced two additional cameras to sit alongside the company's former lone flagship. You may have caught a glimpse of the EOS-1D C at the C300 launch, but what six months ago was a mere mock-up has actually become a reality, likely to ship sometime this year. More out of left field, however, is the C500 -- a higher-end version of the C300 that adds sever