109
100
50
100
600
Video signal
output (%)
Luminance (%)
White clip point
Knee slope(–)
Knee point(+)
Knee point
29
0
AUT
OMA
TED FUNCTIONS
1
SENSOR AND LENS
2
SHOO
TING ST
YLES
3
FILE BASED
4
PICTURE PR
OFI
LE
29
0
AUT
OMA
TED FUNCTIONS
1
SENSOR AND LENS
2
SHOO
TING ST
YLES
3
FILE BASED
4
PICTURE PR
OFI
LE
KNEE
This changes the tone expression in high brightness areas.
■ MODE
■ AUTO: Automatically adjusts the KNEE settings based on
what is selected in the following AUTO SET function.
■ MANUAL: Follows the KNEE settings selected in the
following MANUAL SET function.
■ AUTO SET
■
MAX POINT : 90% to 100%
Determines the maximum knee point level (white level). The
knee slope is automatically adjusted according to the MAX
POINT setting.
Selecting 100% is ideal under most circumstances. A lower
setting will turn white grayish, while a higher setting will
discard gradations in high luminance areas. So, the basic
choice for AUTO SET is to keep it at 100%.
■
SENSITIVITY : LOW / MIDDLE / HIGH
Changes the luminance level at which KNEE setting
automatic adjustment kicks in.
LOW: KNEE setting automatic adjustment starts at lower
input signal levels than normal.
HIGH: KNEE setting automatic adjustment starts at higher
input signal levels than normal.
■ MANUAL SET
■
POINT : 75% to 105%
Sets the position of the KNEE point output level.
■
SLOPE : –5% to +5%
Determines the inclination of the KNEE slope.
A negative SLOPE setting results in a milder KNEE slope
angle. This boosts the dynamic range, but reduces the ability
to reproduce rich gradations.
A positive SLOPE setting makes the knee slope inclination
steeper. This shrinks the dynamic range, but bolsters the
ability to express gradations.
TIPS
In general, the KNEE point is set roughly between 85% and 100%,
which is said to match the luminance levels of human skin.
The knee point and knee slope should be viewed as a set. In
principle, a higher setting for the KNEE point and a milder KNEE
slope should be selected for video-like sharp highlights. If softer
film-like highlight expressions are desired, the KNEE point
should be set lower in combination with a steeper KNEE slope. In
practical terms, you should move the KNEE point and the KNEE
slope up and down in opposite directions to each other while
checking the gradations in high luminance areas until you find
the ideal settings.
Summary of Contents for NEX-EA50 NXCAM
Page 1: ...NEX EA50 Handbook ...