Panasonic HC-V720K Owner's Manual page 47

≥ (Fireworks)
j The shutter speed is 1/30.
j Image may get washed out when recorded in bright surrounding.
≥ (Night Scenery/Night Portrait)
j The shutter speed is 1/2 or more in Still Picture Recording Mode.
j Using a tripod is recommended.
≥ (Night Portrait)
j The flash is set to [ON].
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