Help with Oppo R9 camera?

If anyone owns an Oppo R9, please help me. How do I turn off the auto brightness from the camera app? Like, the brightness I set for the phone doesnt

If anyone owns an Oppo R9, please help me.

How do I turn off the auto brightness from the camera app? Like, the brightness I set for the phone doesn't apply when I open the camera app. This doesn't apply to all cameras; some like B612/Bestie/Aimera don't suddenly become blinding when I open them. It's a really big problem when I want to take a photo in a dim area. I sure hope there's a way to turn that function off.

Thank you in advance!!

or:If anyone owns an Oppo R9, please help me. How do I turn off the auto brightness from the camera app? Like, the brightness I set for the phone doesn't apply when I open the camera app. This doesn't apply to all cameras; some like B612/Bestie/Aimera don't suddenly become blinding when I open them. It's a really big problem when I want to take a photo in a dim area. I sure hope there's a way to turn that function off.Thank you in advance!!

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