䡲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 or LCD monitor.
䡲 Variable Scan [V.SCAN]
• Basic operation
Set the SHUTTER item on the CAMERA OPERATION menu
screen to VARIABLE. Then rotate the SHUTTER dial upward
or downward to change the shutter speed.
(The speed is displayed in the viewfinder or LCD monitor.)
• Compatible frequencies
The variable scan function is compatible with scanning
frequencies in the following range.
60.1Hz to 2084.6 Hz
This function is not compatible with slow-speed computer
monitors with a vertical scanning speed of 50 Hz.
CAUTION:
83
12. FEATURES OF THE CAMERA SECTION
This switch allows the gain to be boosted when the illumination
of the subject is insufficient.
The gain should be switched when the brightness is insufficient due to poor lighting conditions.
GAIN SWITCHING
When the GAIN switch is switched, the newly set gain is
displayed for about 3 seconds on the Status (0, 1, 3) screen in
the viewfinder or LCD monitor.
Set it to L (0 dB) in normal use.
■ The gain set for each of the switch positions can be changed
with “GAIN” on the CAMERA OPERATION menu screen.
It is also possible to use the ALC function that varies the gain
automatically.
A setting at –3dB corresponds to a decreased sensitivity
equivalent to the brightness of a 1/2 filter.
☞ See page 69 for details.
■ The gain transition can be made smoother by selecting
“SMOOTH TRANS” on the CAMERA OPERATION menu
screen.
☞ See page 69.
However, note that the SMOOTH TRANS function is not
available if gain is set to ALC.
Switch Position Factory-Set Gain
L 0dB
M 9dB
H 18dB
The LOLUX button is used when the illumination is still
insufficient after compensating with the GAIN switch.
Pressing the LOLUX button again will enter the LOLUX mode.
The gain up value during the LOLUX mode is set in LOLUX
GAIN of the CAMERA OPERATION menu.
“LOLUX ON” is displayed for about 3 seconds on the Status (0,
1, 3) mode screen in the viewfinder or LCD monitor.
Pressing the button again cancels the LOLUX mode.
“LOLUX OFF” is displayed for about 3 seconds.
■ When the LOLUX function is in use, the image definition on
the screen will degrade to increase residual images, but this
is not a malfunction.
GAIN BOOST UNDER LOLUX CONDITION
Relationship between gain, iris and shutter
12-5 Gain (Sensitivity) Adjustment
GAIN switch
LOLUX on/off button
When gain is set to “ALC”, gain is boosted automatically
as the illumination becomes darker. However, noise will
increase a little because the screen becomes brighter as
the ALC (Auto Level Control) function boosts the gain more
than in the case of manual adjustment.
CAUTION:
