Definitions for "External flash"
A supplementary flash unit that connects to the camera with a cable, or is triggered by the light from the camera's internal flash. External flash is more easily controlled than built in and automatic flash.
a great addition to your camera bag
a great investment, I highly recommend getting one
a necessity on either one you chose
a nice thing to have, but it's something you could wait on if you needed to
Keywords:
photographer, level
a must for any level of photographer