Vivitar VIV-PRO-648 Camera Flash User Manual


 
Power Zooming
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• Automatic motor zoom control
If you are using a zoom lens, which transmit its focal length to the
camera, the camera will pass on this information to the flashgun.
The flashgun then automatically adjusts its zoom position to comply
with the focal length of the lens. Automatic motor zooming reflector
control is only possible with cameras permitting digital data
transmission to the flalshgun.
The LC D display on the flashgun indicates zooming positions of 24-28-35-50-70-85mm.
When the flashgun is switched on, the activated zoom position is set at 35mm. As soon
as the camera's shutter is lightly touched, the focal length of the flashgun is
automatically adapted to the focal length of the lens.
Whenever the flash head is not at a normal position (facing to the front), such as in bounced or
swiveled at different positions, the zoom position will be at 50mm as indicated by the LCD
display with a brief flash in auto mode.