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Old Oct 11, 2012, 09:31 AM   #1
fuzion11
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What does "AE/AF Lock" mean???

In the camera app...if you hold your finger on the screen for a moment you will see this pop up...then if you press the screen again, it'll disappear. What does this do??
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Old Oct 11, 2012, 09:33 AM   #2
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Im guessing auto exposure and auto focus lock.
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Old Oct 11, 2012, 09:34 AM   #3
GGJstudios
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Originally Posted by fuzion11 View Post
In the camera app...if you hold your finger on the screen for a moment you will see this pop up...then if you press the screen again, it'll disappear. What does this do??
Auto Exposure/Auto Focus

How to Use Focus & Exposure Lock with the iPhone Camera
Daily Tip: How to use AE/AF Lock on the iPhone's camera in iOS 5 | iMore.com
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Old Oct 11, 2012, 09:36 AM   #4
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In what circumstances would this feature be useful/beneficial?
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Old Oct 11, 2012, 09:39 AM   #5
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In what circumstances would this feature be useful/beneficial?
For when you're trying to focus on something but the iPhone keeps changing focus to something else (this doesn't happen a lot but sometimes the iPhone picks the wrong thing to focus on).
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Old Oct 11, 2012, 10:38 AM   #6
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For when you're trying to focus on something but the iPhone keeps changing focus to something else (this doesn't happen a lot but sometimes the iPhone picks the wrong thing to focus on).
Additional, AE (autoexposure) lock allows you to meter the exposure on a single point of reference in the frame, and therefore will not change if you recompose from there.

This is very helpful when you are, for instance, taking a picture of somebody with a strong light source behind them (such as the sun) and their face is in shadow. Rather than trying to meter exposure for the whole scene, AE lock will allow you to select the exposure specifically for the persons face, ensuring your subject matter is properly exposed.

This may result in other areas of the photo being over-exposed (blown-out), however.

The iP5's HDR setting tries to mitigate this behavior by combing multiple images at varying exposures to try and keep both light and dark areas exposed properly.

Last edited by NemesisR6; Oct 11, 2012 at 10:43 AM.
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