Iris (Brightness) Adjustment; Adjustment Of Lens Iris; Zebra Pattern Display During Manual Adjustment; Shooting The Screen Image On A Computer Monitor - JVC GY-DV700W Instructions Manual

13. FEATURES OF THE CAMERA SECTION

13-2 IRIS (Brightness) Adjustment

ADJUSTMENT OF LENS IRIS

Iris ring
A19x8.7BW
(A19x8.7BRRM-39)
1:1.8/8.7-165 mm
MADE IN JAPAN
FUJIN0N by FUJI PHOTO OPTICAL CO., LTD.
QUICK Z
or RET M
A
W T
Temporary auto
iris button
Iris mode switch

ZEBRA PATTERN DISPLAY DURING MANUAL ADJUSTMENT

ZEBRA
OFF
SKIN AUTO
ON
AREA WHITE
ACCU
FOCUS
VTR
AUDIO
TAKE
LEVEL CH-1
ZEBRA switch
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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 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 methods.
• Setting the AUTO IRIS LEVEL switch of the camera
See "SWITCH FUNCTIONS" on page 83.
By setting the ZEBRA switch to ON, oblique stripes (zebra
pattern) can be displayed in the sections with a luminance level
of 70% to 80% or sections with levels over 100% in the
viewfinder.
The zebra pattern can be used as a reference for manual iris
adjustment.
When adjusting the iris manually, adjust it so that the zebra
patterns are displayed in the section that you want to stress in
the subject.
• The initial setting is over 95% (WEK)/70 to 80% (WE). How-
ever, using the "ZEBRA" setting on the VF DISPLAY MENU,
zebra patterns can be displayed in the sections with a lumi-
nance level of 70% to 80%(WEK), 85% to 95% and over
100%.
See "VF DISPLAY MENU Screen" on page 72.
13. FEATURES OF THE CAMERA SECTION

13-3 Shooting the Screen Image on a Computer Monitor

Band
Video monitor
OPERATE/WARNING
LIGHT
RESET ON
OFF
MONITOR
FILTER SELECT COUNTER
CTL
1 3200k ALARM
2 5600k+1/8ND TC
UB
3 5600k
4 5600k+1/64ND
SHUTTER STATUS MONITOR
C C
MENU
CH-1 AUDIO CH-2
LEVEL
AUTO IRIS FULL AUTO BLACK LOLUX
BACK L STRETCH
NORMAL NORMAL
SPOT L COMPRESS
NG POWER
ON OFF
SHUTTER dial
- - - OPERAT I ON - - -
SCENE F I L E A
ASPECE RAT I O : 1 6 : 9
SHUT TER : VAR I ABL
FAW : NONE
GA I N L : 0 dB
GA I N M : 9 d B
GA I N H : 1 8 d B
SMOOTH TRANS : OFF
PAGE BACK
OPERATION MENU screen
Outline
The following operation allows the alignment of the shutter
speed of the camera with the variable scanning rate of a
computer monitor or display.
When a computer monitor screen or display is shot with the
camera, a bright horizontal line indicating excessive exposure
is displayed in cases when the scanning rate of the monitor
is faster than the shutter speed of the camera. A dark
horizontal line indicating insufficient exposure is displayed in
cases when the monitor's scanning rate is slower than the
camera's shutter speed.
The scanning frequency of a monitor varies due to various
reasons during the computer operation. Adjust the scanning
rate to obtain a stable image while observing the image in
the viewfinder.
Variable Scan [V.SCAN]
• Basic operation
Set the SHUTTER item on the OPERATION MENU screen
to VARIABLE. Then move the SHUTTER knob upwards or
downwards to change the shutter speed.
(The speed is displayed on the viewfinder screen.)
• Compatible frequencies
The variable scan function is compatible with scanning
frequencies in the following range.
50.1 Hz to 2053.6 Hz
CAUTION:
This function is not compatible with slow-speed computer
monitors with a vertical scanning speed of 50 Hz.
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