Most cameras feature a built-in pop-up flash.
Unfortunately, lighting from a pop-up flash unit is often harsh and unflattering and produces less than happy results. For that reason, I try to avoid using my camera’s pop-up flash as much as possible.
But sometimes your scene just doesn’t have enough light and you have no choice. You have to use the flash to get the photo.
So here are a few tips can help you control the flash and make for better photos.
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We've seen how managing the ISO setting allows you to control the amount of grain that shows in your photos. But it does more than that. Understanding and working with the ISO setting gives us added flexibility in terms of setting the other two exposure settings–aperture and shutter speed.
The bottom line is that ISO is an important and useful tool, and one that you will want to be comfortable with if you are looking to take creative control of your exposure.