Canon USA has just released a new firmware update for its professional EOS-1D X camera that expands the capabilities of its autofocus point illumination. It will now support AI Servo AF as well as cross-type AF at apertures as small as f/8. The former is especially welcome in low-light situations like weddings and theatrical performances, while the latter would benefit those who use EF super-telephoto lenses with extenders, like wildlife photographers for example. In fact, you can check out the now-wider range of compatible EF lens/extender combinations at the sou
