HDR Mode HDR is an option of the photo mode. The HDR takes the same picture with different exposure so you can handle the different light levels of your environment. HDR can only be used in photo mode. HDR can only be activated using the GIROPTIC 360cam app. HDR default settings takes 3 shots at -4, 0, +4 exposure. You can set the exposure from -7 to +7 taking up to 15 shots for 1 picture. The GIROPTIC 360cam does not merge your HDR picture in 1.