Television Production And Camera-III

Television Production And Camera-III

2.Electronic Control:
Some or all of the following controls may be automatic or preset and thus not adjustable by the user.
i. White Balance of the Camera
     If you use outdoor film with normal indoor lighting (no flash) everything
comes out orange. The color temperature of sunlight is very different from an incandescent light bulb. Most consumer cameras now sense the overall color temperature and adjust color electronically. In older or professional cameras it may be necessary with each change in location or lighting to "tell" the camera how to interpret color. Showing the camera a white card, which represents the total absence of color, does this. Controls on the camera are then used to minimize the color output of the camera.

      ii. Gain of the Camera:
Also called "level," this control sets the level of the brightest parts of the picture. It can be used to reduce the level when too much light is striking the pickup tube, but it will not make the picture brighter without making it grainy or snowy if the pickup tube or chip isn't getting enough light.
Automatic gain controls can be extremely sensitive to even small bright parts of the picture, driving medium and darker parts into black. They may
also bring dark parts up into the medium range if there's not enough light for a good picture.
    iii. View finder of Camera:
There are often controls to adjust a camera viewfinder. To state the obvious,
these controls have absolutely nothing to do with the actual output of the
camera. It's helpful to adjust the viewfinder under controlled conditions so it
shows a faithful representation of actual camera output. Otherwise, if you
want viewfinders to tell you the truth, they should never be adjusted just to
make a "pretty" picture.
    iv. Pedestal:
Also called the "set-up" control, sets the level of the darkest parts of the picture. On portable cameras it's generally automatic or totally absent.