Furthermore Google often said that HDR+ only combines frames with the same(!) exposure, only underexposed frames. The Google Nexus 5x doesn't offer HDR+ dng files, so I had to test this with a modified Google camera app apk, which produced the same jpgs and exif data as the stock camera app. 'the exposure time shown in Google Photos (if you press 'i') is per-frame, not total time, which depends on the number of frames captured'įurthermore I have tested with the Google Nexus 5x that about the same highlights are blown out in the HDR+ dng file as when I capture a single(!) frame dng file with a third party app with the same exif exposure time and Iso. The exif data is related to the exposure time of a single frame, therefore it would be inconsistent to relate Iso to the total exposure time.
Dereken, combining multiple frames doesn't affect Google's Iso number.
