Setting the Flash Unit 
Adjustable Range of Flash Unit
The
Standard position index (Horizontal angle) Angle setting scale
Standard position index (Vertical angle)
1This can be rotated. Be sure to hold down the release button when rotating the mount ring. After rotating it to the desired position, release the release button.
2Hold down the rotate button and turn the flash head mount. The flash head can be moved directly at 3 and 4.
Do not adjust the flash head angle beyond the adjustable range. Doing so may cause the flash head to detach and fall from the flash head mount.
The adjustable range may be further limited depending on the camera and lens.
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