Using a tripod correctly for long exposure shots

Why the tripod earns its place in your pack

In British light a tripod stops being a luxury and becomes a working tool. Between the long dusk of a Hebridean summer evening and the flat grey of a February afternoon in the Peak District, you will often find yourself at f/11 and ISO 100 with a shutter speed no pair of steady hands can hold. A decent tripod takes you past that limit: half a second for a beck tumbling over gritstone, two seconds for a retreating tide, thirty seconds for cloud streaming over a limestone pavement.

The catch is that a tripod is only ever as steady as the way you use it. Most soft long exposures come down to a handful of small habits, and they are easy to fix once you know what to look for.

Setting up on uneven ground

Start by splaying the legs wider than feels necessary. The wider the triangle, the lower the centre of gravity and the less the whole setup will shiver in a gust. Extend the thickest leg sections first and leave the thin ones for last — the bottom sections flex most, so use them only when you have to.

Then look critically at what the feet are resting on:

• Peat, moss and boggy ground will compress through the exposure. Push the feet down firmly until they stop moving, or better still shift a few inches onto rock or gravel.
• Wet slate and coastal rock are treacherous. Spiked feet grip well, rubber feet skid. Test by leaning your weight on the head before you mount the camera.
• Sand and dunes shift constantly. Spread the legs wide, sink the feet, and check that the head does not creep on its own while you are focusing.
• Grass tussocks and heather look solid but are often a hollow crust. Give the tripod a gentle nudge and watch the bubble level.

Keep the centre column down, or better, avoid raising it at all — a raised column is the single biggest source of wobble. Use the levelling bubble on your head, or the electronic level in the camera, so your horizon is straight in-camera. Cropping a long exposure later costs you pixels you spent minutes earning.

Cutting vibration to nothing

Once the camera is mounted, your job is to touch it as little as possible. A few habits will transform your keeper rate:

• Turn image stabilisation off. Some systems cope, many do not, and a stabiliser hunting for movement that is not there can smear a long frame.
• Use a cable release, remote or the two-second self-timer. Always. Even the softest press transmits movement through the body.
• Lock the mirror up on a DSLR, or use electronic first curtain on a mirrorless body, to remove the clatter of the shutter and mirror slap.
• Take the strap off, or clip it tight. A dangling strap catching the wind will ruin a thirty-second exposure.
• Hang your bag from the hook underneath — but let it rest on the ground so it cannot swing.
• Stand to windward. Your body is an effective windbreak, and you should be sheltering the tripod rather than pacing around behind it.

On long exposures, switch off long exposure noise reduction if you are stacking frames later, or leave it on if you want the camera to handle it — just remember it doubles your waiting time.

Focus, filters and framing with slow shutter speeds

Composition is harder when you cannot see the result until the exposure finishes, so slow down and get it right in live view. Zoom in to 10x and focus manually on the element that must stay sharp, then check the edges of the frame for distractions you would otherwise crop out later.

Filters make long exposures possible in daylight and dangerous near the sea. A six-stop or ten-stop neutral density filter lets you stretch a shutter speed from 1/60 second into the tens of seconds. Screw it on carefully, watch for light leaking around the edges, and cover the viewfinder eyepiece with the supplied blind — stray light through the eyepiece has wrecked many a dawn shot.

Think about what the slow shutter is doing to your picture. Decide what stays crisp and what blurs, then set the frame around that decision. A static foreground of rock or jetty anchors a scene where water and cloud are streaking past.

Matching shutter speed to the movement

Different subjects want very different times. As a rough guide:

• 1/4 to 1 second gives sea and waterfalls texture and energy while keeping some detail in the water.
• 1 to 4 seconds smooths a stream over boulders into a soft, continuous flow.
• 8 to 30 seconds turns surf into mist around rock pools and flattens choppy water.
• 30 seconds to several minutes draws clouds into streaks across a ridge or a moorland horizon.

Work out the exposure by doubling the time for each stop you add, starting from a metered reading you trust. Shooting in manual and checking the histogram after each frame is quicker than trusting a phone app on a cold hillside. Grasses and trees will also blur, so if you want them sharp, either shorten the exposure or wait for a still moment.

Finally, treat your tripod like the outdoor kit it is. Rinse the legs after saltwater sessions, dry the locks, and clear grit from the threads. Looked after properly, a good tripod will outlast several cameras and reward you with the kind of long exposures that make British weather worth standing in.