Photography in the Brilliance of the Blue Hour

The Short Answer

The blue hour is the stretch of twilight when the sun sits roughly 4 to 8 degrees below the horizon, and the light turns deep, even blue. It usually lasts 15 to 30 minutes, though that window stretches considerably at higher latitudes. It happens twice a day, before sunrise and after sunset.

For landscapes, cityscapes, and architecture, it's the most forgiving light of the day. The sky dims to roughly the same brightness as the ground, so you can expose for both at once without fighting a blown-out sky or a black foreground. Plan the timing in advance, bring a tripod, and expect exposures somewhere between 4 and 30 seconds.

The blue hour is perhaps the most underrated time of each day that only we photographers give due appreciation. Most people appreciate the sunrise and the sunset, especially when they attempt to take photographs, but for any photographer the blue hour has an equal amount of charm with a totally different value.

For photographers who shoot landscapes, cityscapes, and architecture, this is the best time of day to be working. That transitional light gives us the most balanced conditions available, which makes it far easier to photograph large subjects and whole environments without any artificial lighting at all.

It's also why planning matters here more than almost anywhere else. The window is short. We go deeper on the relationship between the two edges of the day in the importance of golden and blue hour in landscape photography.

What the Blue Hour Actually Is

The term gets used loosely, so it's worth being precise, because the precision is what lets you plan around it.

Blue hour is a colloquial term, so unlike dawn, dusk, and the three phases of twilight it has no formal astronomical definition. What it tracks is the sun's angle below the horizon rather than the clock. Timeanddate places the blue colour between 4 and 8 degrees below the horizon, and notes that this range covers parts of both civil and nautical twilight. Some photography references narrow it to 4 to 6 degrees.

The colour itself comes from ozone in the atmosphere absorbing red wavelengths, an effect known as Chappuis absorption, which leaves the remaining light skewed toward blue.

How the Twilight Phases Line Up

Notice that blue hour straddles two phases rather than sitting inside one. That overlap is the reason a printed twilight table alone won't tell you when to press the shutter, and why an app that calculates it for your exact location is worth having.

How Long Does It Last?

Typically 15 to 30 minutes, which is short enough that arriving unprepared means missing it. Latitude drives the difference, because it governs how steeply the sun crosses the horizon.

• Near the equator, roughly 16 minutes. In Quito the sun takes about that long to travel from 8 to 4 degrees below the horizon.

• Around 40 degrees north or south, roughly 20 minutes in March. That covers New York and Wellington.

• Around 60 degrees, roughly 30 minutes at the same time of year. Oslo sits here.

Inside the polar circles the effect goes further. In places that get polar night in winter, the sun may never climb higher than 4 to 8 degrees below the horizon at midday, which produces a blue hour lasting several hours. That is a winter phenomenon, not a summer one.

The practical consequence is the same everywhere: be set up and composed before it starts, not during.

Planning Your Blue Hour Photography

The window is short and the light changes by the minute, so most of what decides whether the shot works happens before it starts. Three things are worth settling in advance.

• Exact twilight times for your location. Blue hour is set by the sun's angle, so it moves with your coordinates and the date. Knowing it to the minute is the difference between arriving early and arriving late.

• Your composition, scouted in daylight. Find the frame hours ahead while you can still see what you're doing. Improvising inside a 20 minute window rarely produces your best work.

• Where the moon will be. A bright moon changes the ambient light, and depending on timing it either sits in your frame or it doesn't. Either way it's better known beforehand than discovered on location.

A planning app covers all three. Photo Expert calculates twilight timing for your exact coordinates and tracks sun and moon positions, and its AR view shows where each will sit in your frame at a given time, which is what lets you fix a composition while there's still light to work by. It's on iOS and Android.

Where Photo Expert and Smart+ Work Together

These two solve opposite halves of the same shoot, and it's worth being clear about which does what.

A typical blue hour evening uses both in sequence. You scout in the afternoon and use AR planning to lock your composition and confirm the moon won't be sitting awkwardly behind your subject. The app tells you blue hour starts at 6:42. You're set up by 6:25. When the light arrives, the trigger handles the long exposures and bracketing while you concentrate on watching the scene and adjusting the frame.

The planning answers what and when. The hardware answers how. Neither substitutes for the other.

Landscape Photography During the Blue Hour

Shooting natural scenery anywhere in the world can be tricky because of lighting conditions. The most common challenge for beginner landscape photographers is managing the difference in brightness between the sky and the land itself. It's why many photographers work the golden and blue hours and use the middle of the day to rest or travel.

What characterises this window is relatively dim light in the sky. In relative terms that makes the landscape brighter in your images. The less bright sky becomes easier to shoot because of the balance it strikes with the darker foreground, which is exactly why this is the best window for landscapes when you haven't yet mastered managing and manipulating light and exposure.

Blue Hour Cityscapes

Natural landscape photography and urban landscapes share a lot of factors. The biggest similarity is the ambient light from the sky and how it behaves. The biggest difference is the artificial light in a city, which affects overall exposure and the balance of luminosity.

Light from buildings, houses, and illuminated infrastructure all contributes to a collective glow coming from the ground. That means the moment when sky brightness and city brightness match arrives earlier in the transition than it would without artificial light in the foreground. Planned for, that difference isn't a disadvantage, just a small adjustment to your timing.

In a particularly active scene it can even work in your favour, letting you use motion from traffic and other moving elements to build attractive visual paths through the frame.

Blue Hour Architecture Photography

Much like cityscapes, there's a lot of advantage in shooting architecture during the blue hour. Timing and light balance together solve most of the lighting challenges architecture presents. Modern buildings usually mean accounting for artificial lighting and surrounding illuminated objects, the same way cityscapes deal with both ambient and artificial light.

For most modern cities, this is the best window available. The sky and the city reach a real balance in luminosity, and they carry complementary colours too. The blue of the twilight sky sits opposite the warm yellow and orange of street lighting and building exteriors. Shoot at the right moment, before the sky goes too dark, and you get a colour harmony that's difficult to manufacture any other way.

Camera Settings for the Blue Hour

Settings shift as the light falls, so treat these as a starting point and expect to adjust every few minutes.

• Aperture: f/8 to f/11 for landscapes and architecture, where you want depth of field across the whole scene.

• ISO: 100 to 400. Keep it low. You're on a tripod, so buy your exposure with time instead of sensitivity.

• Shutter: 4 to 30 seconds depending on how far into the window you are. Early blue hour needs less, late blue hour needs more.

• White balance: shoot RAW and set it later. Auto white balance frequently tries to neutralise the blue, which removes the exact quality you came for.

• Focus: set manually while there's still light, then leave it. Autofocus becomes unreliable as the light drops.

Work quickly and re-check your histogram often. The light at blue hour changes measurably minute to minute, and a setting that was correct at the start of the window will be underexposed by the end of it.

Shooting Methods for the Blue Hour

Whether you're shooting natural landscapes, cityscapes, or architecture, several exposure techniques become necessary. You're dealing with far less light than during the day, so long exposure is unavoidable. Duration depends on how much ambient light is present, which varies with your location and how far into the window you are.

Some situations call for shutter speeds around 4 to 8 seconds, which applies when the sky still holds considerable light and when you're using a moving element to create a visual path. Doing that cleanly requires a reliable remote trigger, which spares you the risk of camera shake and makes the whole process more efficient.

Long Exposure With Smart+

The MIOPS Smart+ goes well beyond pressing your shutter button for you. Its Long Exposure mode holds exposures far past the 30 second limit most cameras impose in standard modes, with timer delay and interval shooting alongside it. It's $279 at the time of writing.

For blue hour work the value is specific. As the light falls you move from 4 second exposures to 30 seconds and beyond, and doing that by hand means touching the camera repeatedly during the exact window you can't afford to introduce vibration.

HDR and Bracketing

Another approach worth considering is HDR through bracketed exposures. You shoot several consecutive frames of the same composition at different brightness levels, then combine them later to draw out detail that's best visible at each level. It works indoors and outdoors, and the blue hour makes it easier than most conditions because the dynamic range you're bridging is already relatively narrow.

Smart+ automates this. You control the number of exposures, the brightness difference between them, and the interval between each shot, which means a full bracket runs without you touching the camera at all.

It also carries Lightning, Sound, and Laser sensors, which matter less for a calm blue hour landscape but a great deal if a storm rolls in across your cityscape while you're set up.

Common Mistakes and Why They Happen

Arriving when blue hour starts is the most common error, and it costs people the best few minutes of the window. Setup, composition, and focus all take longer than expected in falling light. Be in position and framed at least fifteen minutes early.

Leaving white balance on auto quietly undoes the whole point of shooting at this hour. The camera reads the blue cast as an error and corrects toward neutral. Shoot RAW so the decision stays yours.

Using one exposure for the entire window produces a sequence that drifts steadily darker. Check the histogram every few frames and adjust as the light drops.

Touching the camera during a long exposure introduces shake that a tripod alone won't prevent. A remote trigger removes the last point of contact between you and the camera.

Frequently Asked Questions

What is the blue hour in photography?

It is the phase of twilight when the sun sits roughly 4 to 8 degrees below the horizon and the remaining light turns a deep, even blue. It occurs twice a day, before sunrise and after sunset. The colour comes from ozone in the upper atmosphere absorbing red wavelengths, which is a different process from the scattering that makes the daytime sky blue.

How long does the blue hour last?

Usually 15 to 30 minutes, depending on latitude and season. It runs about 16 minutes near the equator, around 20 minutes at 40 degrees latitude, and roughly 30 minutes at 60 degrees. Inside the polar circles during winter, when the sun stays low all day, it can last several hours.

What time is the blue hour?

There's no fixed clock time, because it's defined by the sun's angle rather than the hour. It falls shortly after sunset and shortly before sunrise, and the exact window shifts with your location and the date. A planning app such as Photo Expert calculates it for your precise coordinates.

What camera settings should I use for blue hour photography?

Start at f/8 to f/11 for landscapes and architecture, ISO 100 to 400, and shutter speeds between 4 and 30 seconds depending on how far into the window you are. Shoot RAW and set white balance afterwards, because auto white balance tends to neutralise the blue cast you're shooting for.

Is blue hour the same as golden hour?

No. Golden hour comes first after sunrise and last before sunset, when the sun is low but still above the horizon and the light is warm. Blue hour follows sunset and precedes sunrise, with the sun below the horizon and the light cool and even.

Do I need a tripod for blue hour photography?

Yes. Exposures typically run from 4 to 30 seconds or longer, which is well beyond handheld range. A tripod plus a remote trigger is the standard setup, since the trigger removes the camera shake introduced by pressing the shutter by hand.

Why is the blue hour good for cityscapes?

Because the sky dims to roughly the same brightness as the artificial lighting on the ground, letting you expose for both in a single frame. The cool blue sky also sits opposite the warm orange of street lighting, producing a natural colour harmony.

Keep Exploring

Related reading: Importance of Golden and Blue Hour in Landscape Photography

Related reading: Ten Tips to Capture Amazing Landscape Photos

Long exposure, HDR bracketing, and interval shooting without touching the camera. 

Mastering landscape, cityscape, and architectural photography is best done during the blue hour. Get used to the way the light changes and learn to use it, and you'll take better photographs now while being far better prepared for whatever lighting you meet outdoors later. With proper planning around timing and composition, and careful execution, this window will deliver some of your best work no matter where you are or what you're shooting.