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Shutter speed, iris and gain adjustments (cont.)
Iris and gain adjustments
Iris (F-number):
CLOSE, F16-F1.7, OPEN
Gain value:
0 dB, 3 dB-15 dB, 18 dB
SHUTTER/IRIS
VOL/JOG
PUSH
1/120
1
F2.8
0dB
5
Turn the multi dial to select the F-number.
SHUTTER/IRIS
VOL/JOG
PUSH
1/120
OPEN
1
3dB
7
Turn the multi dial to select the gain value.
6
When OPEN is selected as the F-number,
1
moves to the gain value.
1/120
1
F5.6
0dB
SHUTTER/IRIS
VOL/JOG
PUSH
4
When you press the multi dial, the iris and
gain values are displayed on the screen.
O When “IRIS” has been selected as the
FOCUS RING item setting on the SW MODE
screen using the menus (P68-P71), you can
use the focus ring to adjust the iris and gain
but only when you are shooting in the auto
focus mode. (P76)
Synchro scan shutter speeds
A synchro scan shutter speed is a shutter
speed used to shoot TV screens or PC
monitor screens.
The synchro scan shutter speed is set using
the SYNCHRO SCAN item on the CAMERA
SETUP screen when the synchro scan
shutter speed has been selected by the multi
dial. (P73)
OIf you adjust the shutter speed to match the
frequency of the TV screen or PC monitor
screen, you can shoot the screen while
minimizing the horizontal noise that is
generated when TV screens are shot.
O With artificial lighting and especially fluorescent
lights and mercury-vapor lamps, the luminance
changes in synchronization with the power line
frequency. In areas where this frequency is 50
Hz, mutual interference will occur between the
camera-recorder’s vertical sync frequency
(approx. 60 Hz) and the lighting frequency (50
Hz). This means that the white balance may
change periodically.
Before shooting in areas with a 50 Hz frequency
or adjusting the white balance, set the shutter
speed to 1/100.
O The higher the shutter speed, the lower the
camera’s sensitivity.
O If the shutter speed is increased when the auto
iris is set (when the F-number is not displayed),
the iris will open (the F-number is reduced) so
that the background is more blurred and the
subject stands out.
O Shooting at a slow shutter speed may give rise
to such problems as after-image, a deterioration
in the image quality and difficulties in focusing.
O When a slow shutter speed has been selected,
images are shot with the CCD taking more time
than usual to accumulate the signals.
As a result, very small brilliant points that are
not usually visible may be recorded as the
images: this is normal and does not indicate an
error or malfunctioning.
1
1/60
SHUTTER/IRIS
VOL/JOG
PUSH
5 When the multi dial is pressed, the number
representing the normal shutter speed
appears on the screen.