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THE CAMERA BODY
2.12.5 The Manual Iris
The VAS assist features an automatic gain. In certain situations, ho-
wever, further light control may be desired (such as high contrast or
strong back-light circumstances). In these instances, it is recommen-
ded to employ the manual iris feature, which is located on the CCD
head cover on the battery side of the camera.
Under normal operation, this mechanical iris should be wide open.
When further light control is necessary, look at the video monitor
and move the iris lever to the left to the desired degree.
2.12.6 Battery Life with CCD Assists
The VSA assist draws, because of its color, frame-store and timecode
capabilities, 750ma when powered. This translates into approxima-
tely 3 to 4 hours of operation (without the XTRprod running) from
one 12V 3,2 ah on-board battery. For this reason, it is recommen-
ded to use a battery block or AC power supply when using the VSA
for long periods of time.
Although battery life will vary greatly depending on the amount of
film run and the number of accessories powered from one power
source, you could estimate that one 12V on-board could run 10 ma-
gazines and the VSA for 2-3 hours.
In order to conserve battery life, get into the habit of shutting off
the VSA assist when not in use.
2.12.7 Installing the CCD Head
Under normal circumstances, if you own a video assist, you will not
need to deal with the removal and/or installation of the CCD head.
The head and its accompanying relay lens are designed to remain
within the camera body whether the assist is being used or not.
In some instances, however, such as the renting or sharing of a unit
among a few cameras, it would be necessary to remove and install
this head.
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