I am getting into some HDR photography and was thinking of a new ways that camera manufactures could help us in capturing HDR pictures.
Say you want to capture three image and you have a constant Aperture and ISO with shutter speeds of 1/2, 1 and 2 seconds (for -1, 0 and +1 exposure compensation).
You set the shutter speed to 2 seconds and press the shutter release button.
1/2 seconds later, the camera takes a readout from its sensor and saves the output to a file.
Another 1/2 second later (for 1 second exposure) it takes another readout and saves the data.
1 second after that (for the 2 second exposure) it takes another readout of the sensor and saves the data.
So for a single shutter count, we get 3 images at different points in time.
I am not sure if any cameras does that but is it technically possible to do it?