Welcome to your Perfect Exposures in a Flash

1. What is the correct formula for determining the proper aperture setting when using a flash?
Which of the following statements is true about guide numbers?
What is the correct exposure when using a flash that has a guide number of 80 and is at a distance of 20 feet?
What is the correct exposure when using a flash that has a guide number of 110 and is at a distance of 20 feet?
What is the correct exposure when using a flash that has a guide number of 110 and is at a distance of 15 feet?
What is the correct exposure when using a flash that has a guide number of 60 and is at a distance of 10 feet?
When using a flash with an "automatic zoom head", which of the following will occur if the zoom feature is "On"?
What happens when you turn off the Auto Zoom Head feature of your flash and turn it to the Manual Zoom Mode?