Yongnuo Speedlite YN468-II, User Manual, Page: 9 / 12

after 3 photos are taken, exposure compensation will be made
automatically in the sequence of, for example, “normal
Æ
under
Æ over”. This function helps you improve the success rate of
photo taking.
3. FV Lock (Nikon)
Set the AE-L/AF-L function as FV Lock on the camera before
using this function. At this time, you can aim at your desired
object in the viewfinder and then press the AE-L key or AF-L key,
in such case, the flash light will pre-flash to get the reading of
flash exposure for the object; after you have confirmed the scene
frame, press the shutter. (This function can only be available when
your camera supports it; for the setting of AE-L and AF-L, refer to
your camera manual)
4. FE Lock (Canon)
To use this function, cover the subject for which flash exposure
will be locked at the center of the viewfinder of camera, press the
button <*> of the flash exposure lock, and the flash light will
pre-flash and the camera will calculate the appropriate flash
output data. Now you have some time for recomposition, after
which, you can take photo. (The function can be used only when it
is supported by your camera. For the setting method, refer to your
Camera Instructions.)
5. Rear-curtain Sync
You can use slow-speed shutter to produce trailing smear for the
object and the flash light will flash at the moment when the shutter
is going to be shut, which means the rear-curtain sync
function .(For the rear-curtain sync setting, refer to your camera
manual for setting)
6. Application of AF LED
If the object or environment lacks sufficient light, the camera can
not conduct accurate focusing; at this time, the flash light can give
out AF light to assist in the camera’s focusing so as to achieve
accurate focusing.
7. Exposure Compensation
You can use the exposure compensation function of this camera to
compensate flash output so as to make shooting effect better meet
your requirements.
（
For Canon version, the exposure
compensation function on camera is available only in TTL mode)
In the TTL mode, you can also make compensation of flash