Detailed instructions for use are in the User's Guide.
[. . . ] The advanced features of this flashgun allow you to enjoy AF Macro photography. To make the most of all these features, and to get the maximum performance and enjoyment from your flash, please read this instruction booklet, together with your camera's instruction manual, before using the flash, and keep it handy for future reference. In order to avoid causing any damage or injury, please read this instruction manual very carefully, paying attention to the cautionary signs below, before using the flash. Using the product disregarding this warning sign might cause serious injury or other dangerous results. [. . . ] If this indication does not appear, the flash illumination is not sufficent for that situation. When the camera is set to Creative Zone, please remember that the flash will be set to the last chosen mode each time. when the flash is fully charged , the flash mark will appear in the finder. If the shutter is released before the flash is fully charged, the camera will take the picture at a slow shutter speed, with no flash. It is possible to give the three dimensional effect to your pictures by adjusting the flash ratio of left or right flash tube or by firing only one side of the flash. Pressing + button will increase the left flashtube and pressing button will increase the power amount of the right flashtube. (flash ratio will not be displayed and only firing side will blink) 3. If the flash ratio is set to 1:1 or the mode is changed, this function will be cancelled. By doing this flash unit will be set to default mode, display will show both sides. By selecting the Tv mode of the camera, you can set the shutter speed from 30sec. When you set the desired shutter speed, the camera will select the appropriate aperture value for the background. If the subject is too light or too dark, the aperture value indicator will blink and show the limit values (maximum or minimum aperture). in such as case , the camera proceeds to take flash photograph at the limit value. Thus, the main subject in the picture may be exposed correctly, but the background will become under or over exposed. By selecting the Av mode of your camera, the camera will select the appropriate shutter speed for the background. If the subject is too bright or too dark, the shutter speed indicator will blink and show the limit highest or slowest shutter speed value. Thus, the main subject in a picture may be exposed correctly, but the background will become under or overexposed. When used with M Mode You can set the desired shutter speed and aperture value. If you adjust exposure according to the exposure meter indication, the camera will work as for Daylight synchronization flash or slow synchronization. To prevent overheating of the flash's circuitry, please do not use your Flash unit for at least 10minutes after using the number of flash exposures, shown in the below table have been made in quick succession. it will be beneficial to use a flash meter device for determining the exposure. If the flash output level values of both tubes are the same, the flash output level will be displayed. [. . . ] In this Wireless ETTL Autoflash function, the camera automatically calculates the correct exposure. After you confirm that both master and slave units are fully charged you can take the picture. Wireless ETTL Auto Flash photography, high speed synchro (FP), FE lock, exposure compensation, and FB (Flash Exposure Bracketing) can be used together. After setting Wireless photography, please operate it according to each feature. [. . . ]