What does HDR mean by taking pictures with an Apple phone?

HDR = high dynamic range = high dynamic range.

This function is used to overcome the shortcoming that the dynamic range of most camera sensors is limited when the difference between the brightest and darkest parts is particularly large, and multiple photos with different exposures are superimposed into one.

In a word, HDR can enrich the details of the bright, dark and bright/dark parts.

How to use HDR when taking photos with an Apple phone;

1. Turn on the phone camera, and an "HDR" option will appear at the top of the screen. Click it to enter HDR photography mode.

2. After turning on HDR photography, it takes a long time to click the photo button to take photos.

This is because HDR combines several photos with different exposure times to form the best photo. It will take a long time because it contains a picture with a long exposure time.

3. HDR function is obvious for photos of aurora, but if it is a photo with better light, the effect is not obvious.