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Is there any way to get the exposure settings (aperture, shutter speed, ISO) for a photo taken on an iPhone?

An app running on the iPhone can use the UIImagePickerController interface for taking pictures, but that doesn't provide much info about the picture.

The EXIF data for a photo taken on the iPhone contains aperture info, but not shutter speed or ISO.

Kristopher Johnson
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  • Be careful, you might be treading in "undocumented API" land, meaning your App will get rejected by Apple. I recommend you ask this at the iPhoneDev forums, and get the "Official Answer", that way you'll know if this is kosher or not, and not waste your resources on something that won't be accepted. – Robert Gould Dec 17 '08 at 01:16

2 Answers2

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This is not currently possible using the SDK. If it's something you think is needed, I suggest you file an enhancement request with Apple.

August
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Update, so people coming here would know:

  • In iOS 4 you can set exposure/white balance/focus to some extent. Basically you can control the mode (auto/continuous/fixed) and the point of interest for these parameters.

  • Regardless, if you are capturing still images - you can extract metadata from the image's exif information (actual exposure, shutter speed, iso, etc.)

HTH someone, Oded

Oded Ben Dov
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