impact PowerSync Mini PS16-Mini-R Instructions Manual page 13

Bulb Mode
1. Set your camera to bulb mode.
2. Half-press the test button to wake the camera or activate
autofocus.
3. Fully press the test button to focus and open the
camera's shutter.
4. Release the test button to close the shutter and end the
exposure.
Bulb Lock
Bulb lock lets you trigger the camera and leave the shutter open
indefinitely without holding the test button.
1. Set your camera to bulb mode.
2. Press and hold the test button for three seconds to lock the
shutter open. Releasing the test button will not close the
shutter.
3. Press the test button again to close the shutter and end the
exposure.
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