The focus ring I had on pre-order for awhile from Irv Design finally arrived. It's a necessary addition to the HV20, as it allows more manual control over the...well...focus. You see, instead of a ring, the HV20 has a little roller wheel. Not precise or easy to get to around the LCD screen, unfortunately. This attachment has a little spoke that sticks out with a wheel attached that responds when you turn the ring around the lens, letting you do fun stuff like rack and rolls with ease. I love it. It also fits on close enough where you can use a step up ring and a lens hood without having to remove it. Very cool. Good job Irv.