If you’ve tried the Lux filter in the Instagram for iOS app before, you’ll know that its effects can be quite harsh and overbearing. Today, the app has been updated with a custom slider so that you can tweak the intensity of the effect. That’s pretty much all there is to it. Once you’ve taken a picture or selected a photo from the Camera Roll, you can tap the Lux icon (denoted by a half-filled sun) and then drag the slider as needed. Moving it to the right increases the vibrance and details in the shot, while moving it to...

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