1-When would you use external flash? When it’s dark or not enough light.
2-Do you need to meter the light if you use flash? No, you don’t.
3-What does flash synchronization mean? It syncs to the camera.
4-What does ETTL mean? evaluative through the lens.
5-What will happen when you shoot faster than the camera sync speed? half black screen.
6-Why do photographers bounce the flash and use a diffuser? To soften the light.
7– What is a slave? Something that makes other lights in the room go off.
8-What should you do if your image comes out too dark or too light? If too dark open F-stop and if to bright close F-stop.