http://www.youtube.com/v/3lONEaOYWIEHere's what it looks like with a 20X optical zoom with a doubler lens. Keep in mind, most 3-chip cams only go up to 10X optical (some go 12X). So if you're filming with a 1-chip cam with 20X or 25X and attach a doubler lens, you're probably not going to get a really pristine picture. AND unless you are using a tripod or clamp-pod, it's going to be REALLY shaky.
This clip starts out zoomed all the way out, and then it zooms in, and then it cuts, and then continues with some footage shot zoomed all the way in.
A good idea: change over to manual zoom, zoom all the way in, focus the picture, and then don't adjust it again for the rest of the show. This way, if someone walks in front of you, the cam won't go out of focus. And it won't make any difference anyway for video you shoot while zoomed out - the picture will look the same either way.