GRASS VALLEY LDX 864K, Руководство пользователя

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LDX 86 High Frame Rate/HD/3G/4K Camera Platform User’s Guide (v2.0) 67
Chapter 4 - Video setup
Tip
✎
V-Shift can also be used to remove color shifts that may occur when shooting DLP-type
projectors.
4.7.3 LED Wall Filter
When shooting against LED Wall backgrounds that contain high frequencies, interference may
occur, resulting in unwanted moiré patterns. A special electronic filter is available that can be
used to reduce these effects:
In the camera menu, navigate to the
PRODUCTION SETUP > EXPOSURE
item and switch
LED WALL FILTER
on.
4.8 Color
4.8.1 Color Temperature
For true color reproduction the ambient lighting conditions must be compensated for by
selecting a value for the color temperature. The standard file setting is 3200 K (normally used
for tungsten and indoor lighting). Two other reference color temperatures are available: 5600 K
(for outdoors, clouded conditions) and 7500 K (for outdoors, clear blue skies).
The memory positions (FL50, FL60, AW1 and AW2) are available to store the results of the
auto-white measurement process. The memory positions store measured values using the
automatic white balance switch at the front. The FL positions are recommended for shooting
with fluorescent light.
A continuous automatic white balance position (AWC) is also available. This function
continuously measures the white balance and adjusts it accordingly. It can be used when a
constant color balance is required under changing lighting temperatures (sunsets, indoors/
outdoors use).
4.8.2 Color Tint
In some cases, color temperature alone is not enough to fully compensate for color cast so an
additional tint adjustment is needed. Similar to how color temperature specifies the relative
warmth or coolness of an image, tint generally specifies the balance between magenta and
green color casts. When combined, color temperature and tint can therefore control and
effectively remove virtually any color cast.
4.8.3 Color Filter
In the auto-white positions (FL50, FL60, AW1 and AW2) a Color Filter can be set up in the
PRODUCTION SETUP > COLOR > COLOR TEMP > COLOR FILTER
menu. This varies the color
balance to obtain warmer or colder color effects.
CAM