Philips P2HD AG-HPX170P - Manual (Page 50)

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With artificial lighting and especially fluorescent
lights and mercury-vapor lamps, the luminance
changes in synchronization with the power
line frequency. When this frequency is 50 Hz,
mutual interference will occur between the
camerarecorder’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 artificial lighting or
adjusting the white balance, set the shutter speed
as follows.
Progressive
mode Shutter speed
50 Hz 60 Hz
OFF (60i) 1/100 OFF (1/60)
30P OFF (1/50) 1/60
24P/24PA/
24PN OFF (1/50) 1/60
The gain is fixed at 0 dB with a shutter speed of
1/12 and 1/15. •
Synchro scan
Set the shutter speed of the synchro scan (used
when shooting a television or computer monitor) in
the setup menus, SCENE FILE screen, SYNCRO
SCAN. (Page 98)
Adjust the shutter speed to match the frequency
of the television or computer monitor to minimize
the horizontal noise that appears when shooting
such subjects.
By switching to progressive mode you can also
shoot PAL system television screens.
When the OPERATION TYPE option in the
SCENE FILE screen (page 98) is set to FILM
CAM, the shutter opening angle can be adjusted
from 10° to 360° in 0.5° steps.
Example: When the recording frame rate is set to
24 fps and the exposure time is halved, 1/24÷2 =
1/48 = 180° (1/24 = 360°)
In the default setting (180°), this becomes 1/2 of
the exposure time. If it were 90°, it would be 1/4,
and if it were 45°, it would be 1/8 of the exposure
time.
(Shutter opening angle: This is equivalent to the
shutter speed of a film camera, and a wider angle
results in a longer exposure to light.)
If the shutter speed is displayed in blue
characters followed by (1/60), you cannot change
the shutter speed in the blue characters while the
current recording format is used. The speed is
fixed at (1/60).
You can change the progressive mode in
the setup menu with REC FORMAT in the
RECORDING SETUP screen. (Page 104)
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Adjusting the shutter speed (continued)