GRASS VALLEY LDX 864K, Руководство пользователя

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66 LDX 86 High Frame Rate/HD/3G/4K Camera Platform User’s Guide (v2.0)
Chapter 4 - Video setup
• Clear - no filter is placed in the optical path
• ND1/4 - 2 stops light reduction neutral density filter
• ND1/16 - 4 stops light reduction neutral density filter
• ND1/64 - 6 stops light reduction neutral density filters
☞
Note
☞
Note
When a Neutral Density filter is selected, the ND indicator in the viewfinder lights (only for
ocular viewfinders).
Three Effects (FX) filter positions are available
1)
:
• Clear - no filter is placed in the optical path
• Star 4P - Four Point Star filter
• Sft Fcs - Soft Focus filter
☞
Note
☞
Note
The camera does not need color optical filters to be able to white balance correctly. The range
of the auto-white balance is so wide (from 2500 K to 20000 K) that there is never any need to
use color filters to obtain the correct white balance.
4.7 Exposure
4.7.1 Lighting correction
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 Hz. To reduce flicker select the frequency closest to the frequency of the lights and then
vary the lighting control in the
PRODUCTION SETUP > EXPOSURE > LIGHTING
menu to obtain
the best result.
4.7.2 V-Shift (vertical acquisition shift)
When shooting monitors with (almost) the same display frequency as the camera’s, for
example TV sets, a horizontal black bar can be seen in the viewfinder. This phenomenon occurs
because the camera is blanking while the monitor is not. The V-shift
function shifts the camera
blanking to synchronize it with the blanking of the monitor.
In the camera menu, navigate to the
PRODUCTION SETUP > EXPOSURE > ACQ TIMING
menu
and switch on the
V-SHIFT
item. Use the
V-SHIFT TIME
item to change the time shift until
the horizontal bar disappears.
CAM