Can I use the regular camera app to take 21:9 4K photos? Can I use the regular camera app to record 21:9 4K videos? Can I shoot 21:9 4K photos and videos with the Camera app?
To record videos in 4K (3,840 x 1,644), you can use Cinema Pro. If you want to take 21:9 photos, also use Cinema Pro. To take a 4K (3,840 x 1,644) photo, first shoot a video clip. Then, while playbacking the video, take a screenshot of the part of the video you want as a photo. If you settle for a 21:9 photo with 2,520 x 1,080, tap the Grab button while you are in recording mode. The Grab button is available in the viewfinder when you're not recording.
The normal camera app is intended for casual usage of snapping everyday life, whereas Cinema Pro is intended for creating stories using 21:9 with professional parameters and colour settings. 21:9 is the default aspect ratio set by film creators.