It’s funny when you are on vacation and see people taking photos from a moving vehicle using an iPhone. The standard iPhone App has no ability to really increase its shutter speed to 1/800 of a second, so you have to install an app like Halide. The photograph below is taken from a train, and has a somewhat artistic flair to it. The closer to the horizon, the less blur there is, because the train is moving slower with respect to distance closer to the horizon (i.e. motion parallax).

But if you are using the Apple camera app, you can’t control shutter speed. Of course it is easier to adjust these sort of settings on a DSLR, using shutter-priority. If you want to control aspects like the shutter speed, you have to turn to an app like Halide. The only problem with this is I find changing settings on an app to be fiddly… one of the reasons to travel with a real camera, and not rely solely on mobile devices. Regardless, it is almost impossible to remove these types of motion blur from an image, where the blur only exists in one plane of the depth of field.

Here’s a great intro to shutter speed on the iPhone, an intro into advanced photo shooting on the iPhone, and some info on the manual controls in Halide.