Quote:
Originally Posted by Dark7pt1 /forum/post/19526233
I was watching the Sony ad video clip for the NEX-VG10 HD cam with the interchangeable lens ability and the "4 capsule mic" (sold out in Canada). In the video the focus at one point switches from the foreground subject to one in the background seamlessly. How do cams do that? Do most HD cams have a "foreground AF/background AF" button allowing you to switch back and forth?
Probably done like any other camera, by manually adjusting the focus...
On my Panasonic HDC TM700, you simply put it in "manual focus mode" and turn the front ring.
It could also be done in "auto focus mode" with "focus zone selection" (if the camcorder is equipped with such a system like the TM700) but the result would be a very quick change from one subject to the other instead of a slow, smooth one.
In any case you need a camera with manual control of shutter speed and aperture, (or better yet a ND adjustable filter) in order to get a shallow DOF to begin with. And camcorders with small sensors will have less of a wide range as large sensors ones.