I hope this isn't a stupid question. Smartphones have a HDR option, where you can take 1 shot and the smartphone then applies HDR. With a camera, you can't do (to the best of my knowledge) HDR with a single shot. You take successive shots with different EVs obtained by changing the aperture, but other than that, the shots are the same. So time, ISO and frame are untouched: a tripod is used to guarantee that all shots are aligned. The process is fairly mechanical: I only decide if I want to use 1 or 2 stop intervals, which corresponds to 3 or 5 shots.
Why can't this be done automatically by the camera itself? It requires 2 ingredients:
- to be able to take multiple shots in rapid succession: most cameras can do that (Burst mode)
- to be able to modify the aperture automatically. All cameras can do this: exposure time, ISO and aperture are all set by the camera if one uses Auto mode.
In practice, I would set time and ISO, choose the number of shots (or equivalently the interval in stops between successive shots) and the camera would take the shots in rapid succession. It seems both convienient and easy to do. What am I missing?