Camera Setup

After attaching the AS-E900 adapter, turn the flash to the ON position and set the flash mode to TTL. The flash should not be set to the stand-by mode (i.e., STBY); otherwise, it may turn off unexpectedly. If it is possible, the on flash zoom should be set to 28mm or wider.

You have two choices. You can either allow both the external flash and internal flash to fire. Or, you can turn off the internal flash and only use the external one. To turn off (i.e., disable) the internal flash, follow the procedure below:

• Set the camera to the P mode, A mode, S mode or M mode by holding the MODE button and turning the command dial at the same time.
• Press the MENU button once to enter the first page of the SHOOTING MENU. You will see the following screen:
  
• Use the down arrow of the multi-selector to enter the menu system. The first menu item is highlighted as shown in the left image below. Then, press the MENU button twice to enter the third page as shown in the right image below.

• Use the down arrow of the multi-selector to highlight the Speedlight Opt. option as shown in the left image below. Then, use the right arrow to select this option. The SPEEDLIGHT OPT. menu appears as in the right below.

• Use the down arrow of the multi-selector to highlight the Speedlight Cntrl. option as shown in the left image below. Then, use the right arrow to select this option. The SPEEDLIGHT CNTRL menu appears as in the right below.

• Now, there are two options to choose from. The option Internal Off turns off the internal flash so that only the external flashes fire. The option Int&Ext Active allows both the internal and external flashes to be fired at the same time. Use the up and down arrows to choose the desired option and press the multi-selector to make a selection.
• Once the above steps complete, press the MENU button twice to return to the shooting mode.

  Note that once this option is chosen, it will stay there even after turning off the camera. Therefore, you need to go through the above procedure again to reverse the setting..

To enable the internal flash, follow the above procedure to select the Int&Ext Active option.

External Flash Settings

Similar to the internal flash, there are four different external flash settings available when the Speedlight Opt. is set to Internal Off to turn off the external flash. Each flash setting is indicated by a pair of icons shown in the upper-right corner of the LCD monitor. The meaning of each flash setting is shown in the table below. Note that the internal flash icon (i.e., the right icon of the two) means Flash Cancel because it is turned off. If the internal flash is not turned off, the icons shown on the LCD monitor display only the status of the internal flash. The four external flash modes are:

LCD Icon	Meaning
	The Flash Cancel mode. Turn off the external flash. Since the internal flash is also off, no flash illumination is available.
	The Auto mode. When illumination is poor, the external flash fires automatically.
	The Red-Eye Reduction mode. However, the red-eye reduction is performed by the internal flash rather than by the external one.
	The Anytime Flash or Fill Flash mode. Force the external flash to fire. This is useful for fill flash.
	The Slow Synchronization mode. Activates the Slow Synchronization capability of the external flash.