Flash Basics

▸ Up close and personal with spectra, the inverse square law, and guide numbers

▸ How to meter exposures and use light shapers

▸ Set up and unleash your flash

Even without flash, you need plenty of practice to successfully juggle exposure times, ISO values, and apertures while you shoot. Flash adds even more variables to the mix. The routine of everyday photography becomes more complex with the introduction of flash output, subject distance, angles of emission, and light-shaping tools. When you use flash, rusty old friends like exposure times need to be reviewed and you will need to learn new techniques like high-speed sync and second-curtain sync. The following sections explain the relationships among all these factors, and

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