It's all been about the EOS 5D Mark II and Nikon's D90 HD video recording options for the last few weeks, but owners of the Canon EOS 40D will be interested in this hack which lets the DSLR record video without a cable tether. And here's the video proof for that. The hack involves coding new software that locks up the mirror, which denies the camera the ability to autofocus… but the results speak for themselves. Sure, it's not a HD video output, but it's damn neat. [Project via CrunchGear]