Iris (Brightness) Adjustment - JVC GY-DV5100U User Manual

12-2 IRIS (Brightness) Adjustment

ADJUSTMENT OF LENS IRIS
Iris ring
RET
W
ZEBRA PATTERN DISPLAY DURING MANUAL ADJUSTMENT
OFF
ON
ZEBRA switch
12. FEATURES OF THE CAMERA SECTION
M
A
T
Temporary auto iris
button
Iris mode switch
ZEBRA
SKIN AUTO
AREA WHITE
ACCU
FOCUS
VTR
AUDIO
LEVEL CH-1
5
The lens iris can be adjusted using any of the
following three methods.
● Automatic adjustment
Set the iris mode switch to "A" (Auto).
The iris is adjusted automatically according to the brightness
of the object.
● Manual adjustment
Set the iris mode switch to "M" (Manual).
The iris can be adjusted manually by rotating the iris ring.
● Temporary auto iris adjustment
During manual iris adjustment, the auto iris adjustment mode
is activated only while this temporary auto iris button is held
depressed.
Changing the auto iris adjustment setup
Under special lighting conditions such as backlight, it is often
appropriate to change the value set by the auto iris
adjustment.
This can be done by the following method.
● Setting the AUTO IRIS LEVEL switch of the camera
☞ See "SWITCH FUNCTIONS" on page 93.
By setting the switch to ON, oblique stripes (zebra pattern) can
be imposed on the viewfinder or LCD areas having luminance
levels in accordance with the menu settings made for the video
signal.
The zebra pattern can be used as a reference for manual iris
adjustment.
● The initial setting is 70 to 80%. However, using the ZEBRA
setting on the LCD/VF (1/2) menu screen, zebra patterns
can be displayed in the sections with a luminance level of 85
to 95%, over 95% and over 100%.
☞ See "LCD/VF Menu Screen" on page 81.
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