the head of the chain of other essential electronic camera equipment. The
camera head itself has a series of attachments and controls that help you
use the camera efficiently and creatively.
e. Portable cameras, used for the ENG/EFP, are self-contained, which
means that they contain all the electronics equipment necessary to produce
and deliver to a portable VR high quality color pictures.
7.
How the camera works.
All TV cameras, whether color or monochrome,
big studio models or small portable ones, work on the same basic principle,
the conversion of an optical image into electrical signals that are
reconverted by a television set into visible screen images (fig 1-5).
Figure 1-5.
Basic principle of the camera.
The
light, reflected off the object (a) is gathered by the
lens (b) and focused on the camera pickup tube (c).
There light is transformed into electrical energy, the
video signal.
It is amplified and processed (d, e)
and converted back to visible screen images in the
viewfinder (f).
8.
Monochrome cameras. The monochrome camera is color blind. Its single
camera pickup tube reacts only to the various degrees of brightness, which
are the light and dark areas and shades of gray of a scene as viewed by the
lens.
a. Basically, the light areas in the screen produce a relatively strong
video signal, the dark area a weak signal. When reproduced on a television
monitor, the strong video signal shows up as a bright spot on the screen and
the weak signal as a dark area.
If two colors happen to be the same
brightness, a monochrome camera produces video signals of identical
strengths, which in turn, show up on the monitor as the same shade of gray.
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