Contrast; Contrast Adjustment; Black Stretch - GRASS VALLEY LDX 86 HS User Manual

5.4 Contrast

5.4.1 Contrast adjustment

To create more or less contrast in the picture, luminance levels can be adjusted independently
for three tonal ranges: shadows, midtones and highlights.
OCP Press the GAMMA button, the NEXT button, the NEXT button again and switch on
CONTRAST. Select SHADOWS, MIDTONES or HIGHLIGHTS to adjust the luminance level for
each range between 0 and 99.
CAM
In the camera menu, navigate to the CREATIVE CONTROL > LEVELS > CONTRAST menu and
switch CONTRAST on. Use the SHADOWS, MIDTONES or HIGHLIGHTS items to adjust the
luminance level for each tonal range between 0 and 99.
Values below 50 decrease luminance levels while values above 50 increase levels.
☞ ☞
Note Note
Contrast adjustment is always applied after Gamma.

5.4.2 Black Stretch

The Black Stretch function changes the level of tones in the shadow areas of the picture
without affecting the rest of the picture.
LDX 86 HS/XS HiSpeed/XtremeSpeed HD camera User's Guide (v1.0)
Shadows Midtones Highlights
Chapter 5 - Video setup
63