Optical Triggering: FJ400Updated 2 months ago

The FJ400 features an optical sensor that allows it to be triggered remotely by another flash or strobe unit fired nearby. 
This sensor is located near the mini plug and air intake at the bottom of the unit.
It’s important to know the location of the optical sensors as they need a line of sight of the triggering flash. It is only available when units are set to Manual mode, as TTL and HSS data cannot be transmitted.

Enabling optical triggering with the FJ400

1. Set to Manual Mode: Ensure the FJ400 is in Manual mode by going to Menu 1 and changing the mode to Manual. (M)
2. Enable Optical Sensor: Enter Menu 3 and press the button next to the Eye icon to activate the optical sensor. The Eye icon will appear on the screen and CH and GR will disappear when optical triggering is enabled.

With the optical sensor activated, units will fire simultaneously with an initial flash from any make or model, provided the flash output is sufficient and the sensor detects the signal.

Preventing Sleep Mode: 

• FJ400: Enter Menu 6 by long-pressing the top menu button and set the Auto-off option to "OFF." 
• If this option is not available, check your firmware version for updates, as early firmware versions may not include this setting.