So you can see the effect of different position of the flash and how it brings impact to a portrait photography.
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This was shot with the flash mounted on the camera, so it's a direct flash like what everyone does with a point and shoot camera.
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This was shot with the wireless flash placed on the left side of the duck.
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This was shot with the wireless flash placed on the right side of the duck.
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This is the last one, was shot with the wireless flash from top, notice the shadow direction?
So which one you prefer?