Long Exposure is a photographic technique where the camera’s shutter (or its computational equivalent) remains open for an extended period — typically anything from 1/4 second to several minutes — allowing moving elements in the scene to blur while stationary objects stay sharp. On smartphones, action cameras, and drones, long exposure is almost always achieved through software: the device captures dozens or hundreds of short frames and composites them into a single image that mimics the effect of a physically slow shutter.
How Long Exposure Works
In traditional photography, long exposure is mechanical: you set a slow shutter speed, light accumulates on the sensor over time, and anything that moves during that window becomes a streak or blur. The exposure triangle still applies — a slower shutter means you need a lower ISO or narrower aperture to avoid overexposure.
Phones don’t have mechanical shutters, so they fake it — brilliantly. When you select “Long Exposure” or “Light Trails” mode on an iPhone, Pixel, or Samsung, the phone shoots a rapid burst (often 30+ frames over 2–3 seconds), aligns them to compensate for hand shake, and then blends the moving elements using image stacking algorithms. The result looks like a 2-second exposure but with the sharpness of a handheld shot. It’s computational photography at its most practical.
Classic Long Exposure Effects
There are a handful of long exposure looks that never get old:
Light trails. Cars on a highway at night become rivers of red and white. This is probably the most popular long exposure subject on phones, and it works remarkably well because the contrast between bright headlights and dark surroundings is exactly what the stacking algorithm needs.
Silky water. Waterfalls, rivers, and ocean waves turn into smooth, milky flows. On a phone, you’ll typically need 2–5 seconds of capture time and a steady surface (or a phone tripod) to get the effect clean.
Star trails. Leave the camera pointed at the sky for minutes (or hours), and stars draw arcs across the frame. This is harder on phones — battery drain, sensor noise, and processing limits make true star trails a challenge. Apps like StarTrails or ProCam can help, but expect to do some post-processing.
Crowd removal. A lesser-known trick: a very long exposure in a busy tourist spot can make people disappear entirely, since no individual stays in one position long enough to register. Some phones now offer this as a dedicated “remove crowds” feature.
Long Exposure on Phones
Apple introduced Live Photo long exposure with iOS 11 — you take a Live Photo, swipe up, and select “Long Exposure” to blend the 3-second capture into a motion-blurred image. It’s dead simple but limited: you can’t control duration, and the results depend heavily on how much motion was in the original clip.
Android phones vary widely. Google Pixel offers “Long Exposure” in the Motion mode, Samsung has a dedicated “Light Trail” scene in Expert RAW, and OnePlus/Xiaomi phones often include manual shutter speed control (up to 30 seconds) in their pro modes. The manual approach gives you more control but requires a tripod or stable surface — handholding a 10-second exposure, even with OIS, produces mush.
Third-party apps like Slow Shutter Cam, ProCam, and NightCap expand your options significantly. They offer bulb mode (keep the shutter open as long as you want), light-trails-only capture (only accumulates bright pixels), and noise reduction specifically tuned for long exposures.
Long Exposure on Action Cameras and Drones
GoPro cameras support long exposure through their Night Photo mode — you can set shutter speeds up to 30 seconds, which is plenty for light trails and star photography. The catch: GoPros have tiny sensors with relatively high noise, so exposures beyond a few seconds get grainy fast. A GoPro on a tripod at a highway overpass at dusk, though? Surprisingly capable light trails.
Drones present a unique opportunity for long exposure: aerial light trails and nighttime cityscapes from above. DJI drones with manual exposure control (Mini 4 Pro, Air 3, Mavic 3) can shoot shutter speeds up to 8 seconds. The drone’s gimbal stabilization helps enormously, but even slight wind-induced drift shows up in a long exposure. Calm nights and a locked gimbal are essential.
Tips for Better Long Exposures
Stability is everything. A phone tripod or propping your phone against a solid object makes or breaks the shot. Hand-holding works for computational long exposures (where the phone compensates), but not for manual slow shutter modes.
Use a timer or remote. Even tapping the shutter button introduces shake. Set a 2-second timer, use your earbuds as a remote shutter, or use voice control if your phone supports it.
Shoot in low light. Long exposures in bright daylight will blow out completely unless you’re using an ND filter (yes, phone ND filters exist — clip-on versions from Moment and others). Dusk, night, and overcast conditions are ideal.
Experiment with duration. A 1-second exposure gives you subtle motion blur; 30 seconds turns a busy intersection into an abstract painting. There’s no right answer — the best duration depends on how fast your subject is moving and how much blur you want.
Long exposure is one of those techniques that looks complicated but is genuinely accessible on modern devices. The phone in your pocket can produce results that required a DSLR, tripod, and ND filter set just a decade ago. Start with light trails at night — it’s the easiest win and the most immediately impressive.
