Panasonic AG-HPX170P Adjusting the shutter speed, Synchro scan, Progressive Shutter speed Mode

Adjusting the shutter speed (continued)

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	Shutter speed
mode	50 Hz	60 Hz
OFF (60i)	1/100	OFF (1/60)
30P	OFF (1/50)	1/60
24P/24PA/	OFF (1/50)	1/60
24PN

•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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