One of the good things about on-camera flash is that it travels with you. Sure, this on axis light gives a really terrible flat light and red eyes, but it is always with you. you'd most likely get better, more directional light from an off camera flash, but setting this up takes time and space, which You don't always have.
This is why they invented the flash brackets, and why Jerry Hamby made a PVC version of it. A flash bracket is a contraption that attaches to the camera and creates some distance between the flash and the lens. (Bye, bye red eyes).
When your flash is on a bracket you would need to trigger it and you can do so with a sync cable, a TTL cable or (if your flash supports it) trigger it wirelessly. And before the comments start poring about this, we know that the lens cap is on, this is just for illustration) Click to continue ›