Shooting night scenes and low light

Why low light is hard

The exposure triangle makes the reason clear. With less light, keeping the same brightness means opening the aperture, leaving the shutter open longer, or raising ISO. Most phones have a fixed aperture, so only two options remain. A longer shutter smears hand shake and moving people; higher ISO adds grainy noise and mushes detail. Low-light photography is a balance between those two costs, and the more firmly the phone is held still, the more light it can gather with the shutter instead of ISO, which improves quality.

Steadiness is half the job

A tripod is the surest option, but there are plenty of alternatives. Rest or set the phone against a wall, pillar, railing or bench, or use a bag as a support. The shake from tapping the screen is bigger than you think, so turn on the camera's 2 or 3 second timer so the shot fires after your hand lets go. If you must shoot handheld, use both hands, tuck your elbows in, breathe out and hold still. Taking several shots of the same scene raises the chance that one of them is sharp.

Using night mode properly

Night mode on recent phones often captures several short exposures over a few seconds and merges them. Merging reduces noise and brightens dark areas, but you must keep the phone still until it signals the capture is done. Lowering the phone the instant you press the shutter is the most common mistake. Some phones use a longer capture when they detect they are on a stable support. Moving people and cars can smear or appear as translucent ghosts, so when photographing a person, ask them to hold still for a moment too.

Exposing to protect highlights

Night scenes combine very bright spots such as streetlights, signs and lit windows with a dark sky. If the camera brightens everything to rescue the shadows, the lights blow out into white blobs and lose their color. Blown-out areas cannot be recovered in editing, while slightly dark areas can be brightened later to some extent. So with night scenes it is safer to tap the screen and pull the brightness slider down a little. Shooting in the blue period right after sunset, before the sky turns fully black, narrows the gap between sky and lights and makes things much easier.

Flash only reaches nearby

A phone flash is a small light source with a short reach. It does almost nothing for a building or stage a few meters away; it just lights whatever is in front and turns the background black. Using flash straight away for night portraits makes faces flat and shiny and wipes out the city lights behind. Try night mode first to keep the ambient light, and use flash only when the face is too dark, or better, have the person turn toward a nearby streetlight or shop window.

Lens smudges and flare

If hazy halos or streaks appear around lights in night shots, the cause is often fingerprint grease on the lens. Wiping it with a soft cloth before shooting helps a lot. With a bright light in the frame, small dots of light sometimes appear on the opposite side; these come from reflections inside the lens, and changing the framing slightly moves or removes them. When shooting through glass, press the lens close to it and shade around it with your hand or clothing so indoor lights do not reflect.

Light trails and long exposures

Photos where car lights stretch into lines are made by keeping the shutter open for several seconds or more. If your phone has a manual shooting mode, you can try settings like the ones below. Always do this with the phone held steady, and adjust the values to the brightness of the scene.

• Keep ISO as low as possible to reduce noise
• Start the shutter at a few seconds and adjust while watching trail length
• Focus on something distant, then lock focus
• Turn on the timer to remove shake from pressing

Safety and manners at night

Hunting for a good angle can draw you close to roads, rail tracks or waterside railings, and at night drivers spot people late. Do not stand in dangerous spots, and do not enter restricted areas or private property. When setting up a tripod on a sidewalk, do not block the way, and in residential areas be careful not to capture people's windows. Do not go alone to dark, deserted places, and tell someone where you are going. Phone batteries drain faster in the cold, so charge up with plenty to spare.