Looking to capture professional-quality video on the cheap? You've probably considered a DSLR, but for many users, an interchangeable-lens camera might not be the best pick. Camcorders and higher-end video rigs typically offer far more powerful autofocus capabilities, and while Digital SLR footage can look great, if you're not tweaking the lens manually, things might not go as smoothly as you'd hope. Canon's setting out to change that, with its brilliant new EOS 70D. On t