The purists answer is to shoot RAW, but many just want a solution that doesn't require any post-effort off the device, for that the answer is "sort of": 1. Tak

The purists answer is to shoot RAW, but many just want a solution that doesn't require any post-effort off the device, for that the answer is "sort of": 1. Taking Live photos can be a good work around, since this mostly maintains the individuals frames which are used to build the full image. Use the built in photo editor to go to a different frame in the live photo and set this as the Key Photo - this dodges a lot of the HDR/image adjustment process. 2. Using the AE/AF lock can prevent a fair bit of the automated adjustments from taking place. (Tapping the screen on dark areas or hot points will adjust the exposure, holding your finger for a moment will turn on the AE/AF lock keeping it there as you move the phone around.) 3. If it's not just for one shot, but all shots you take. Go to the Camera settings and turn on preserve "Exposure Adjustment", in the settings which starts each camera session with the exposure settings preserved from earlier - and simply keep this on 0.0. This can also make it more straight forward (one tap) to undo much of the automatic levelling without locking AE. Similarly you may want to also disable night shooting for darker scenes, by preserving that setting too. 4. On older iPhones, disable the HDR mode.