Long Exposure Photography in Daylight

What daylight long exposure means

A long exposure keeps the shutter open long enough for moving things to blur while static things stay sharp. At night that happens almost by itself (see night long exposure techniques). In daylight there is far too much light, so you have to reduce it deliberately. The usual tool is a neutral density (ND) filter, which darkens the whole scene without changing its color in any major way.

The reward is a particular look: water turns silky, clouds drag into streaks, and moving people can fade into a faint haze around buildings and landmarks.

Gear you need

• A sturdy tripod. Anything slower than roughly 1/30s on a long lens, or a second or more on any lens, needs a stable support.
• ND filters. A 3-stop (ND8), 6-stop (ND64) or 10-stop (ND1000) filter are common choices. A variable ND is convenient but can add unevenness or a dark band at its extremes.
• A remote release, cable or the self-timer. Touching the camera during the exposure can cause blur.
• A lens cloth, plus a way to block the viewfinder. Light can leak through the viewfinder of a DSLR during long exposures.
• Optional: a circular polarizer. It removes roughly one to two stops and can cut reflections, but it is not a substitute for an ND.

How ND strength relates to shutter speed

Each stop of ND halves the light, so each stop doubles the shutter time you need for the same exposure. A quick way to work: meter the scene without the filter, then double the shutter time once per stop of ND.

These are starting points. Real filters vary slightly and may add a color cast, so check the histogram and adjust. If your camera’s longest shutter speed is 30 seconds, use Bulb mode with a remote for anything longer.

Step-by-step settings

1. Mount the camera on the tripod and compose. Check your manual about turning stabilization off on a tripod.
2. Focus first. Autofocus often struggles through a dark filter. Focus before attaching it, then switch the lens to manual focus so it does not refocus.
3. Switch to Manual mode and set the lowest native ISO, often ISO 100 or lower.
4. Choose an aperture around f/8 to f/11 for sharpness. Very small apertures such as f/22 can soften the image through diffraction and make dust spots show.
5. Meter without the filter. Note the shutter speed that gives a good exposure.
6. Attach the ND filter and lengthen the shutter time by the filter’s stops, as in the table above.
7. Take a test shot, check the histogram and highlights, and adjust. Add a stop or so if it is dark.
8. Use a 2-second timer or remote release and shoot several frames, since waves and clouds vary from one frame to the next.

Shooting RAW makes it easier to correct any color cast afterward.

Starting points by subject

• Moving water (waves, streams): Often 0.5 to a few seconds gives soft texture. Longer times tend to turn waves into mist, while shorter ones keep some detail.
• Clouds: Streaking becomes obvious at roughly 30 seconds to a few minutes, depending on wind speed. Pick days with clearly moving clouds.
• Crowds and traffic: A few seconds to tens of seconds makes people thin out. People who stand still stay sharp, while walkers become ghosts.

Common problems and fixes

• Blurred static elements: Check tripod stability, hang weight from the center column in wind, and avoid bridges or soft ground that vibrates.
• Color cast (often blue or magenta): Set a custom white balance or fix it in RAW editing. Cheaper filters tend to be worse.
• Light leaks: Cover the viewfinder or close the eyepiece shutter on a DSLR.
• Overexposed highlights: Add ND strength or shorten the exposure, and check the highlight warnings.
• Dust spots: Small apertures reveal sensor dust. Clean the sensor or remove spots in editing.
• Vignetting with stacked filters or thick holders: Zoom in a bit or crop.

Can you use flash in daylight?

Photographers do use flash in daylight, mainly to fill shadows on a subject. It can also be combined with a slow shutter in a technique called slow sync, where the flash freezes the subject while ambient light records motion trails. In bright sun you would still need an ND filter or a very small aperture, and flash sync speed limits apply, so it is more advanced than the rest of this guide.

Is f/4 enough, and should you overexpose?

For daylight long exposures, a wide aperture like f/4 lets in more light, which is the opposite of what you need, so you will usually stop down instead. As for exposure, slight underexposure protects bright highlights in skies, and you can raise shadows from a RAW file. Heavy underexposure adds noise in the shadows, so it is a trade-off.

Related techniques

Slow shutter speeds also drive camera-moving techniques. See intentional camera movement for painterly blur, or panning photography when you want a sharp moving subject against a streaked background.