In the majority of snapshot scenarios the internal flash can manage just fine. You and your mates out a local pub or gathered around the dinner table, are all within the design parameters of most point-and-shoot cameras. Even high end professional cameras like the Canon 5D and Canon 7D have pop-up flash units built into the camera for just such situations.
Move outside that relatively narrow window covered by the camera's internal flash and low light photography becomes a technical challenge that will require either a much larger external flash unit, or some manual intervention by you.
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Low Light Photography |
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Low Light Photography |
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Low Light Photography |
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Low Light Photography |
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Low Light Photography |
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Low Light Photography |
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Low Light Photography |
With professional grade cameras it's possible to purchase external flash units that are powerful enough to, literally, light the world. At least the world 290 feet in front of the lens, which is an amazing amount of light power.