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Retina flash is a new function Apple added on the iPhone to help “selfie” photos have higher quality in low light conditions.
The way this function works is quite simple, Apple’s screen will automatically turn on to full brightness to turn the screen into a flash for the front camera.
The brightness is automatically fine-tuned depending on the ambient light level.
Thanks to this solution, the iPhone does not need to add many components such as a flash to the front, increasing the simplicity of the device.
In addition, the screen can display colors with good tones, making the flash light not too bright, making the color of the photo more accurate.
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