tankboygreg
Contributor
Gilligan:Sunpak (link) is an under $200. strobe that comes with a tray.
Thank you, thank you, thank you. It looks like just what I need at the price point I was looking for.
Warren_L:A slave sensor a sensor that triggers the strobe to fire when it detects a pulse of light from another strobe or flash. In this case, your onboard flash would fire and then triggers the slave sensor to fire the flash that it is connected to. This does not require a wired connection from the camera to the strobe (which requires a wire to pass through a bulkhead from outside the housing to the inside of the housing. Your onboard flash controls the firing of the external strobe.
The Canon A620 does not have a connection for the flash so it requires a strobe with slave sensor.