How can I capture light trails from passing cars and other moving lights with my smartphone? I am using an iPhone 6S.
Here is an example of what I want to capture:
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In general, you need to set long exposure, likely several seconds, and set your aperture and ISO appropriately to achieve correct exposure. For long exposures you need to make sure that your camera is absolutely steady. Tripod is usually used for this purpose.
You would need an app that can control the ISO, exposure time and aperture.