Your digital camera’s built-in flash may do more than you think. Here is a quick look at some of the in-camera flash settings available to you and what they do. We used a Nikon D3100 for the purposes of this article. But whichever camera you use, it should have similar options within its flash settings menu.
Change the flash mode
Press the button on the side of the pentaprism to pop up the flash, and keep it pressed while turning the rear command dial – the camera cycles through the modes.
To adjust the flash strength, hold the flash button and turn the front dial. On cameras with one dial, hold the EV compensation and flash buttons and turn the rear dial.
By default, the internal flash uses iTTL auto exposure, but you can switch to manual using the Shooting or Settings menu and set the flash output manually.
Flash shutter speed
On some enthusiast/pro models, you can set the exposure time in Program (P) and Aperture-priority (A) modes to allow for very low background light levels.
On more advanced models you can use the built-in flash to capture multiple images (of a golf swing, say) with the camera on a tripod, using the Repeating Flash options.
This mode is only available on more advanced Nikon DSLRs. You can use the internal flash to control two or more external flash units wirelessly.
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