Knoptop chimes in this week on Quick FX with a simple trick that can be very useful. If you do a lot of one-man-banding with your camera, you might be in a quandary on how to get proper focus. If you are near the camera (like me in my webisodes), focusing is easy. If your camera is out of reach, however, how do you check focus? Dave's come up with a nifty trick that allows us to do just that.
The rule is that you always focus on the talent's eyes. Dave has made a set of portable eyes that he's clamped onto a mic stand and parked in the same spot he's going to be standing. Not only is this good for framing, but now he can check focus on his "eyes". If you have a zoom lens, zoom in and focus, then zoom out. Dave is obviously using a prime lens, which doesn't zoom. An external monitor can help you immensely when you have to check critical focus like this.