Moving to Manual
Many photographers initially feel nervous about switching their flashes off automatic and taking full manual control, but once you get used to it, and understand exactly how the flash works, it’s easy.
If you leave your flash on auto, there are two different ways it works. The first is the TTL setting, where the camera meters the flash output through its lens, and stops the flash when it senses the right amount of light has been emitted. The second way is the old-school “Auto” mode, where a sensor in the flash gauges how much light is being bounced back from the subject, so it knows when to cut off. This way was always thought to be inferior to the new-fangled TTL measuring, but can actually be more accurate with wide-angle lenses. ...
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