Article ID : 00009522 / Last Modified : 04/13/2018

Set up Wireless Flash with Optical Communications

    IMPORTANT: This article applies only to specific products and/or operating systems. Check Applicable Products and Categories for details.

    Follow these steps to set up an optical communications controlled wireless external flash. Check your product manual for model-specific information. Manuals are posted on your model support page.

    1. Attach the external flash to the flash accessory shoe of the camera.
    2. Turn on the camera.
    3. Set the camera to one of the following modes:
      • Program Shift (P)
      • Aperture Priority (A)
      • Shutter Priority (S)
      • Manual (M)
    4. Turn on the external flash.
    5. Set the camera to the wireless flash mode.
      • The external flash is set to wireless mode automatically and WL displays in the flash data panel.
      • The camera's flash switches from being a light source to a controller.
      • The light output of the camera's flash is reduced to the point that it doesn't affect the exposure.
    6. Remove the external flash from the camera.
      • To add an external flash, manually match each additional flash to the configuration of the first flash.
      • Set each additional flash in remote (RMT) mode.
      • Additional flashes need to be set to use the same channel, like CH1, CH2, CH3, or CH4.
    7. Set up the control flash:
      • For an A-mount α (Alpha) camera with a built-in flash, raise the built-in flash.

      • For other compatible cameras, attach an external flash to the flash accessory shoe.

    8. Set the appropriate exposure settings on the camera.
    9. Take a picture.


    • The flash on the camera triggers the external flash when the picture is taken.
    • ADI metering is canceled and the P-TTL flash metering is used automatically in wireless flash mode.
    • If you need to mount the flash, use the 1/4" tripod mount of the supplied mini-stand. Don't use an ADP-MAA shoe adapter which may prevent the flash from firing wirelessly.
    • Additional information on using wireless flash with optical and radio communications is available.