Vinten Radamec Legislative Control System - Manual (Page 30)

Vinten Radamec LCS Operator’s Guide
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Iris control knob
Use the Iris control to set exposure levels. To fine-tune the
Iris, rotate the IRIS control knob.
The ability to control a camera’s iris opening (‘aperture’)
plays an important role in image quality. The iris is used to
maintain the optimum light level to the image sensor so that
images appear sharp, clear and correctly exposed and with
good contrast and resolution.
The iris can also be used to control the depth-of-field. A
wide-open iris has a short depth-of-field, which allows
distracting objects in the foreground or background to be
placed out-of-focus. A closed-down iris is likely to keep both
foreground and background in sharp focus. Either state may
be desirable, depending on the directorial needs.
Black control knob
The BLACK control allows the operator to adjust the video
black point to improve the contrast of the capture.
Focus control knob
There are several factors that influence on focus, ranging
from available light levels to the focal length of the lens and
the zoom settings applied. Put very simply, subjects filmed
under good lighting conditions appear sharper with less
noise; those filmed under poor light appear ‘softer’ with a
noisier image.
To fine-tune the focus, rotate the FOCUS control knob.