<p>We're all used to receiving firmware updates for our digital cameras, but major changes to fundamental features of the camera are another matter entirely. For customers of Canon's Cinema EOS C100 digital video camera, however, the second update announced in just a handful of weeks will see a huge change offered for the way in which the camera performs autofocus.</p><p>A few weeks ago, we reported on Canon's upcoming firmware update for the EOS C100, which adds some handy features such as increased sensitivity and peripheral lens correction. That update is slated to arrive sometime this month, and now we hear that it will be followed by another update in the first quarter of 2014. Where this month's update is user-applied, though, the following update requires that the camera be returned to the factory, and a US$500 service charge be paid.</p><p>Why would you want to go to the trouble of returning your camera and handing over $500? For many videographers who rely solely on manually-pulled focus, you wouldn't. For those who do use autofocus, however, the update enables a feature hidden on the EOS C100's sensor since launch: much the same Dual Pixel CMOS AF functionality first seen in the EOS 70D. In a nutshell, you can add on-chip phase detection autofocus functionality -- or more accurately, enable that which until now has lain in wait, disabled on your EOS C100's sensor.</p><p><a href="http://www.imaging-resource.com/news/2013/11/08/canon-to-enable-hidden-on-chip-phase-detect-for-cinema-eos-c100-video-camer">Keep reading...</a></p>