Canon today chose an unusual mid-day update to launch a pair of updates to its pro HDV tape camcorders. The XH A1S and XH G1S both have had their 20X zoom lenses upgraded to give better control over focus, irising and zoom as well as camera firmware that lets users adjust the zooming speed to deliver a more natural feel to pull-in or pull-out shots. Audio has also been given a boost with two XLR
