Long Exposure

Term: Long Exposure
Description: Long exposure photography, otherwise known as slow-shutter photography or shutter drag photography, is a technique that involves keeping the camera shutter open for a longer period of time to capture motion blur. Common examples of this technique can be seen in nights cape images that capture star trails, ocean pictures that capture the motion in waves, and cityscapes that capture the light streaks in moving cars.

Long exposure photography — sometimes called shutter drag — is one of the most accessible creative techniques in photography, and one of the most visually striking. A slow shutter speed transforms moving water into glass, turns passing headlights into sweeping light trails, and renders crowds invisible. None of it requires expensive gear. It requires a tripod, the right settings, and an understanding of what each technique actually does.

These five techniques range from landscape long exposures to flash-based light streak work to Milky Way nightscape photography. Each one uses a different approach to creative shutter speed control, and each produces results that simply aren’t achievable any other way.

This article is part of our Learn Photography guide.
See the complete Learn Photography guide

Gear you need for long exposure photography

A tripod is non-negotiable. Every technique below uses a shutter speed slower than you can hand-hold reliably — usually slower than 1/10 sec, and often far slower than that. Any camera movement during a long exposure ruins it, and no image stabilization system compensates for a multi-second exposure. A sturdy tripod and either a remote shutter release or the camera’s self-timer are the two things that separate sharp long exposures from blurry ones.

Beyond that, any camera body and lens combination works. The techniques below scale from entry-level kit lenses to professional primes. The limiting factor is your settings and execution, not your gear level.

For more on shutter speed and how slow shutter speeds interact with exposure, see our complete shutter speed guide.

Technique 1: Silky smooth water

Long exposure photograph of Stearns Wharf Santa Barbara showing glassy silky smooth ocean water achieved with slow shutter speed on a tripod

A long enough exposure blurs any motion in the frame — which means moving water becomes a smooth, glassy surface that looks nothing like its actual turbulent state. The image above was shot at Stearns Wharf in Santa Barbara. The Pacific Ocean has waves. You wouldn’t know it from this shot.

The effect scales with exposure length. The longer the shutter stays open, the more the water motion averages out. A 4-second exposure starts to smooth the surface. A 30-second or longer exposure in dim light can render even choppy water completely still.

How to do it:

  1. Mount the camera on a tripod.
  2. Set aperture to f/16 or f/22 — a small aperture forces a longer shutter speed for correct exposure and increases depth of field. Note that f/22 introduces some diffraction softness; the tradeoff is usually worth it for this technique.
  3. Set ISO as low as your camera allows — base ISO produces the cleanest long exposures.
  4. Set shutter speed as slow as needed for correct exposure. Longer is better for the water effect.
  5. Use a remote release or 2-second self-timer to avoid camera shake when pressing the shutter.
  6. Bracket a few exposures — slightly under-exposed versions often handle the water tones better than a “correct” exposure.
  7. In post, dodge shadows and burn highlights to balance the final exposure.

The three images below show the same location at different times of evening with different exposure lengths. The progression from individual visible waves to partial blur to fully glassy surface shows how dramatically shutter speed changes the final result.

Medium long exposure at Stearns Wharf showing partially blurred water with some wave detail still visible at 4 seconds

Short exposure at Stearns Wharf showing individual wave crests fully visible with no motion blur in the water

If you’re shooting in daylight and can’t achieve a slow enough shutter speed even at f/22 and base ISO, a neutral density filter is the solution. A 6-stop or 10-stop ND filter blocks light entering the lens, forcing the camera to use a much longer shutter speed for the same exposure value. This is the standard tool for daytime long exposures of water.

Technique 2: Light streaks with camera movement

Wedding dance floor photographs showing creative light streak effects created using the camera twist technique with slow shutter speed and on camera flash

This family of techniques uses deliberate camera movement during a slow exposure to paint light streaks across the frame. Combined with flash, which freezes the primary subject at the moment of firing, you get a sharp subject surrounded by abstract motion — a look that’s particularly effective at wedding receptions and events where colored ambient lighting provides the raw material for the streaks.

The camera twist:

  1. Set shutter speed to 1/8 sec to allow ambient light to register.
  2. Use an on-camera or off-camera flash to freeze your subject.
  3. As you press the shutter, twist the camera in your hands. The twist creates circular light streaks from any light sources in the frame while the flash freezes the subject cleanly.

The whip pan:

Long exposure whip pan photograph showing horizontal light streaks created by panning the camera on a tripod with a slow shutter speed and flash

  1. Mount the camera on a tripod and loosen the panning knob so the head rotates freely.
  2. Set shutter speed to 1–2 seconds.
  3. Use flash to freeze the subject at the moment of firing, then pan the camera horizontally during the remainder of the exposure to create horizontal light streaks across the background.

Both techniques reward experimentation. The intensity of the streaks depends on the brightness of ambient lights in the frame, the duration of the exposure, and the speed of the camera movement. No two frames will be identical, which is part of the appeal.

Technique 3: Light streaks with moving lights

Long exposure photograph of sparklers being waved in front of a camera on a tripod showing bright light trails against a dark background

Instead of moving the camera, this technique keeps the camera stationary and lets moving light sources draw themselves across the frame. Sparklers, handheld string lights, passing cars, steel wool (with appropriate safety precautions), and phone screens are all common tools. The camera records the path of any bright moving source as a continuous trail.

  1. Mount the camera on a tripod.
  2. Set shutter speed to 1/10 sec or slower — the exact duration depends on how long you want the light trails to extend and how much ambient light you’re working with.
  3. The moving light source does the rest. Have your subject wave sparklers, trace shapes, or spell letters. The camera records everything the light touches during the exposure.

Car light trail photography works on the same principle at a larger scale. Find an elevated position above a road at night, set a 15–30 second exposure, and let traffic draw the streaks for you. The red taillights and white headlights travel in opposite directions, creating natural separation in the frame.

Technique 4: Milky Way and nightscape photography

Milky Way nightscape photograph showing the galactic core above a landscape with a human subject in the foreground illuminated by a separate light source

Photographing the night sky requires long exposures by necessity — stars simply don’t produce enough light to register at fast shutter speeds. But there’s a specific constraint that makes Milky Way photography different from other long exposure work: the stars are moving. Leave the shutter open too long and they trail, producing streaks instead of points of light.

The 500 rule is a common starting point: divide 500 by your focal length to get the maximum shutter speed in seconds before star trailing becomes visible. At 24mm on full frame, that’s approximately 20 seconds. At 14mm, approximately 35 seconds. On a crop sensor, apply the equivalent focal length — a 14mm lens on a 1.5x crop body needs to be treated as a 21mm equivalent, giving you roughly 23 seconds maximum.

Milky Way photography settings reference chart showing recommended starting shutter speeds ISOs and apertures for zoom and prime lenses

Use the starting point guide above to dial in your settings, then adjust from there based on your results. A few additional considerations for nightscape work:

  1. Focus manually using live view magnification on a bright star. AF won’t work in the dark.
  2. Use base ISO as a starting point, then push upward as needed — noise is less damaging than underexposure in nightscape work, but balance matters.
  3. If you want a subject in the foreground, use a brief flash or a handheld light source to illuminate them during the exposure, or composite a separately exposed portrait shot over the landscape frame.
  4. A remote shutter release or self-timer prevents camera shake at the start of the exposure.

Technique 5: Isolate subjects using motion blur compositing

Engagement portrait photograph using long exposure motion blur compositing technique to show moving crowd in the background while keeping the couple sharp in the foreground

This technique combines a sharp plate shot with a long exposure to create images where your main subjects are crisp and present while the world around them blurs into abstraction. It’s particularly effective for portraits in busy public spaces — a couple sharp against a ghosted, motion-blurred crowd creates a sense of the two being alone in the world even while surrounded by people.

  1. Mount the camera on a tripod and frame your shot.
  2. First, shoot a plate shot at a fast shutter speed with your subjects in position. This is the sharp foundation layer.
  3. Then, without moving the camera, slow the shutter to 1/10 sec or slower and shoot multiple frames as people move through the scene. The moving elements blur or ghost out entirely over a long enough exposure.
  4. In post, composite the sharp plate shot over the long exposure frame, masking the subjects from the plate onto the blurred background. The result shows sharp subjects in a world of motion.

The technique works best in locations with consistent foot traffic — busy parks, pedestrian streets, public squares. The more people moving through the background during the long exposure, the more ghosted and abstract the background becomes. Stationary elements like buildings and trees remain sharp in both frames and align perfectly when composited.

For more on the foundational skills behind long exposure work — shutter speed, exposure control, and tripod technique — see our guides on shutter speed, histograms, and camera holding technique. The complete Learn Photography hub has the full progression.

Frequently asked questions about long exposure photography

What shutter speed counts as a long exposure?

There’s no fixed threshold, but practically speaking, any shutter speed slow enough to require a tripod for a sharp result qualifies as a long exposure. That’s usually somewhere around 1/10 sec or slower for most shooting situations, though the exact threshold depends on focal length and subject movement. For water blur effects, meaningful smoothing usually starts around 1–2 seconds. For star photography, exposures of 15–30 seconds are standard. For extreme effects like full water glass or crowd ghosting, exposures of several minutes may be used.

Do I need a neutral density filter for long exposure photography?

Not always. At night or in low light, the ambient light level naturally forces long exposures without any filtration. ND filters become necessary for long exposures in daylight, when even the smallest aperture at base ISO still results in a correctly exposed image at a shutter speed faster than what the technique requires. A 6-stop ND filter extends a 1/100 sec exposure to roughly 0.6 seconds. A 10-stop ND extends it to approximately 10 seconds. For daytime silky water and motion blur work, a 6-stop or 10-stop ND is the standard tool.

Why are my long exposure shots coming out blurry even on a tripod?

Several possible causes. The most common is pressing the shutter button manually and introducing vibration at the start of the exposure — use a remote release or 2-second self-timer to eliminate this. On DSLRs, mirror vibration can cause slight blur at certain shutter speeds (roughly 1/15 to 1 second) — mirror lock-up addresses this. Wind vibration affecting a lightweight tripod is another common culprit on outdoor shoots. Finally, check that your image stabilization is turned off — IS and IBIS systems can actually introduce blur on a fully stationary camera during very long exposures because they hunt for movement that isn’t there.

Can I do long exposure photography without a tripod?

For most long exposure techniques, a tripod is genuinely necessary — you can’t hand-hold a 10-second exposure. For shorter slow-shutter work (1/10 to 1/2 sec), the bracing techniques in our camera holding guide can extend what’s achievable without a tripod. The camera-twist and whip-pan techniques intentionally involve camera movement during the exposure, so a tripod isn’t required — the blur is the point. But for any technique where static elements need to be sharp, a tripod is the only reliable solution.

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