Arrright i got some of it now....
well....tell me should it be a good practice to measure the distance and then set the focus according to that??? As we here in our school normally do it without measuring the distance and focus by eye watching in the eye-piece. I normally use DSR-450 or Cannon XL 1.
Should i make it a practice to set focus by measuring the distance? Does this work with dv cams(as they have the zoom lens mostly)???
Or it works only with fixed/prime lenses.
Hey Malik. You have to remember that, on Union productions in the United States and Europe, there's often a camera operator and a dedicated focus-puller position. Operator gets to look through the eyepiece. Sometimes there's a video monitor for the focus puller to use to judged distance (as is almost always the case with Steadicam). Sometimes there's no monitor.
So, in essence, the focus-puller is pulling focus "blind". That is why they have to take all of the precautions in the world sometimes, and actors have to hit specific marks, because all but the absolute best pullers can accurately, to within the inch, tell how far somthing is away, just by looking at it.
Obviously, focusing by eye with a monitor or optical viewfinder makes it a lot easier, but having measurements, tape marks at specific distances as guidelines will help a focus-puller double check on the distance, just to make sure everything is where and how far away it should be.
Hope this helps. . .
Oh, yeah, this'll work with everything, although keep in mind that some video cameras measure focus from the front of the ring on the focusing dial, whereas with a lot of film cameras, distance is measured, as it should be from the film/sensor plane at the back of the lens. Measure from the correct spot from your camera or don't measure at all! Finally, with a zoom lens, you want to focus by eye with the lens zoomed all the way in on the subject to be focused upon, then zoom out if need be for the actual shot.
Edited by Karl Borowski, 27 September 2008 - 12:58 PM.