When would you use external flash? When there is a little bit of light on your subject.

Do you need to meter the light if you use flash? No

What does flash synchronization mean? In photography, flash synchronization or flash sync is the synchronizing the firing of a photographic flash with the opening of the shutter admitting light to photographic film or electronic image sensor.

What does ETTL mean? ETTL is the mode where the camera uses information obtained through the lens (“TTL”) to calculate how much light the flash needs to emit for the appropriate brightness.

What will happen when you shoot faster than the camera sync speed? You will end up with black bars.

Why do photographers bounce the flash and use a diffuser? It’s used to soften or spread the harsh, concentrated light that bursts out of the flash, creating a more even and flattering light on the subject. It also helps remove heavy shadows created by the harshness of the strong lighting. … The larger the diffuser, the softer the light will be.

What is a slave? Slave flashes are and behave like any other flash units. They can be mounted on your camera’s hot-shoe mount and be radio-triggered using transceivers just like any other flash.

What should you do if your image comes out too dark or too light? Change the ISO