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Question:

What means the expression "slave" in accordance to flashes?

I am getting into amateur photography and I am just learning about external flashes for my Digital Camera. Now I already found out what the difference btw an strobe and a bounce flash is (not quite but i have an idea) and now they are talking about slave flashes or something. I'm lost! Can someone help me with my question and has an answer to it?
I appreciate all serious answers. Thank you


Best Answer - Chosen by Asker: A slave flash goes off to add to the main flash. It has a light sensor or a radio receiver (if you have high-end flash units) which sense when the main flash is triggered.

You can buy add-on slave sensors to add to extra flash units to convert any automatic flash unit to a slave.

Bounce flash is just a technique where you press a button on your flash which lets it pivot so you can point it at the ceiling (or sometimes a wall) and bounce the light onto your subject instead of the flash being pointed right at your subject.