Vivitar POWER ZOOM DF-383 - Manual (Page 9)

Removing Your Flash
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• For Type CAN, NIK & PEN flashes : Loosen the lock ring and
remove the flash by pulling it backwards.
• For Type OLY & PANA flashes: Press both sides of the
Lock/Release Button towards the direction indicated by the
arrow symbols and then take the flash off by pulling it
backwards.
• For Type SON flashes: Push the Shoe Release Button and pull the
flash off by pulling it backwards.