Canon EOS 7D Mark II Wi-Fi Adapter Kit Manual

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In the <d> <s> <f> <a> <F> 
modes, just press the <D> button to raise 
the built-in flash for flash photography. 
Before shooting, check that [D] is 
displayed in the viewfinder. After shooting, 
push the built-in flash back down with your 
fingers until it clicks into place.
In the <A> mode, the built-in flash will be raised and fire automatically 
in low-light or backlit conditions. You can also enable or disable the 
flash firing.
The table below shows the shutter speed and aperture settings that will 
be used with flash.
D
 Using the Built-in Flash
Shooting Mode
Shutter Speed
Aperture
A
Automatically set
Automatically set
d
Automatically set 
(1/250 sec. - 1/60 sec.)
Automatically set
s
Manually set (1/250 sec. - 30 sec.)
Automatically set
f
Automatically set 
(1/250 sec. - 30 sec.)
Manually set
a
Manually set (1/250 sec. - 30 sec.)
Manually set
F
Exposure continues while you hold 
down the shutter button or while 
the bulb timer is operating.
Manually set
Flash Photography in the <f> Mode
To obtain a correct flash exposure, the flash output will be set automatically 
(autoflash exposure) to match the manually-set aperture. The shutter speed will 
be set automatically between 1/250 sec. - 30 sec. to suit the scene’s brightness.
In low light, the main subject is exposed with the automatic flash, and the 
background is exposed with a slow shutter speed set automatically. Both the 
subject and background look properly exposed (automatic slow-speed flash 
sync). If you are handholding the camera, keep it steady to prevent camera 
shake. Using a tripod is recommended.
To prevent a slow shutter speed, under [z1: Flash control], set [Flash 
sync. speed in Av mode
] to [1/250-1/60 sec. auto] or [1/250 sec. (fixed)
(p.263).