GRASS VALLEY LDK 300, User Manual

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Operating instructions | Video preferences 4-19
Selecting the exposure time
The momentary up/down Exposure time switch (16) gives a choice of exposure time
settings.
If an exposure time other than nominal is selected, the Non-standard indicator (33)
in the viewfinder lights.
Film
The Film function is a variable exposure function with running shutter. The Clean scan
range is wider but with the Film function highlights do not cause a smear effect. If the
Film function is selected the exposure time can be set in the
VF
menu.
Lighting
The exposure selection also includes lighting control positions which can be used when
shooting with lighting that is operating at a different frequency to the camera. There
are two positions; 50 Hz and 60 Hz. Each of these positions can be varied further in a
range from -10 to +10. To reduce flicker select the frequency closest to the frequency
of the lights and then vary the lighting control in the
INSTALL
menu to obtain the
best result.
Shooting screens
Sometimes when shooting TVs or computer monitors a horizontal bar can be seen
across these screens in the viewfinder. There are two ways of removing the noise bar
from the picture depending on the frame frequency of the display:
• For displays with the same frame frequency as the camera, for example TV sets,
use the V-shift facility.
• For displays with a higher frame frequency, for example computer monitors, use
the Clean Scan facility.
Table 4-5. Exposure time values
Value Function
Nom. - nominal setting
Var. - enables the exposure to be varied
CRT - for shooting sync-locked monitors
Film - to vary the exposure with running shutter
1/200 - for fast moving objects
1/500 - for fast moving objects
1/1000 - for fast moving objects
1/2000 - only with IT and ITW versions
EVR - extended vertical resolution (IT only)
50 Hz - shooting with 50Hz lighting (adjustable)
60 Hz - shooting with 60Hz lighting (adjustable)