KJ1985

What does HDR do on the iPhone?

I've turned HDR on on my iPhone but the only difference I recognise is that it takes two pictures at a time??

Most Useful Answer spruceyb  Jun. 24, 2014 at 14:06

HDR takes 3 photos.
All with different exposures.

Your iPhone saves a normal photo and the HDR result.
In the normal photo depending on lighting you might be missing some detail in the shadows because the exposure was too short to capture it, same for highlights (like bright skies end up looking white) where the exposure is too long. HDR combines the details from the 3 photos to make 1 photo that has a "High Dynamic Range"

Some situations it works well, a portrait in the sun (where a persons face might appear overexposed), landscapes (where you might lose the detail in the sky) and if you're forced to take a photo of something backlit (that would result in what you wanted to photo being too dark).

Never use it when capturing any motion though, as the moving subjects will appear blurred.

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spruceyb  Jun. 24, 2014 at 14:06

HDR takes 3 photos.
All with different exposures.

Your iPhone saves a normal photo and the HDR result.
In the normal photo depending on lighting you might be missing some detail in the shadows because the exposure was too short to capture it, same for highlights (like bright skies end up looking white) where the exposure is too long. HDR combines the details from the 3 photos to make 1 photo that has a "High Dynamic Range"

Some situations it works well, a portrait in the sun (where a persons face might appear overexposed), landscapes (where you might lose the detail in the sky) and if you're forced to take a photo of something backlit (that would result in what you wanted to photo being too dark).

Never use it when capturing any motion though, as the moving subjects will appear blurred.

JanSt / MOD  Jun. 24, 2014 at 14:08

You can change the behaviour in Settings => Photos and Camera => so the camera will only save the combined "HDR" image. Not the individual images it's composed of.

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