Bolt vs-570s User Manual page 22

button on your camera halfway to initiate communication between the camera and the flash, the flash zoom
will adjust to match the lens focal length and the closest zoom setting will be displayed on the LCD. If you
zoom your lens, the flash zoom setting will change automatically.
When the flash head is angled up or swiveled to the side, the zoom position is set to 50mm. The "50mm"
indicator will flash on the LCD, and the zoom can then be manually adjusted (see below).
Note: Older cameras that do not offer digital data transmission with the flash do not support the automatic
flash zoom control. The manual zoom control must then be used.
Manual zoom control: To manually select a setting that corresponds to the focal length of your lens, press
the Zoom button to make the M indicator for manual mode appear. Then continue to press the button to cycle
through the available focal length settings.
Note: Manual zoom can also be used to achieve special effects, such as using the 105mm setting with a wide-
angle lens to produce a vignette.
Using the flash with wide-angle lenses: When you have a lens wider than 24mm mounted on your camera,
you can use the built-in diffuser panel to give the flash an angle of coverage equivalent to that of an 18mm lens.
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22 Controlling Flash Coverage (Zoom)