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Blue hour, especially the one in the evening (yes it happens before sunrise too!), is probably the most popular time of day to take cityscape photography with dazzling city lights illuminated. But exactly when is the prime time of blue hour that could result in you getting the best possible shots?
One note before we get started. Although you could shoot handheld at blue hour by bumping the ISO up, it’s always advisable to use a tripod in order to shoot clean (noise-free) photos with low ISO (e.g. 100). It also comes with an added bonus of letting you do long exposure photography with smoothed-out water, etc.
For your information, sample photos shown in this post are all shot using my trusty Manfrotto MT190CXPRO3 carbon-fibre tripod.
Let’s get down to business. In terms of timeline, SUNSET comes first, followed by DUSK 20+ minutes later. The time between sunset and dusk is called TWILIGHT, and NIGHT falls once dusk is over.
To find out your local sunset and dusk time, simply go to timeanddate.com and search for your city (e.g. sunset and dusk time in Singapore on January 26th, 2018 will be 19:18 and 19:40 respectively). Or alternatively, search Google using “dusk date city” format (e.g. dusk January 24th, 2018 Singapore). Then, Google returns a dusk time even before the first result. Checking a dusk time has become a second nature to me whenever I’m shooting at blue hour, locally as well as traveling abroad on holidays.
Note: Apps like PhotoPills are also really helpful for planning shooting times and figuring out the sunrise, sunset and dusk times daily in any location worldwide.
In this 20 or so minutes between sunset and dusk, the first 10 minutes are still not quite “ripe”, as city buildings are not yet fully lit up, and the sky hasn’t yet taken on the beautiful bluish hue that appears towards the end of dusk. Use this time to decide on your composition, do some test shots, etc.
When there are about 10 minutes left before dusk, more city buildings will be lit, and bluish hue starts to appear in the sky, getting deeper and deeper with every single passing minute. It’s these last 10 minutes of dusk that are undoubtedly the prime time to shoot blue hour photography.
In addition, the limited available light at blue hour allows for your shutter speed to naturally get longer, especially with the use of a small aperture. Shoot in Aperture Priority mode and use a bigger f-stop number such as f/13, which helps create smoothed-out water and rushing clouds effects (provided that you’re shooting with a tripod).
To enhance such effects, try shooting with a neutral density (ND) filter attached. ND filters help reduce the light that is coming through the lens, allowing you to use much slower shutter speeds.
For example, with a 3-stop ND filter attached, a base shutter speed of 2-seconds is extended to 15 seconds. For a greater effect, use 6-stop ND filter to extend a base shutter speed of 2-seconds to 128 seconds (just over two minutes), which gives your photo a surreal and dreamy feel that is typically seen in long exposure photography, like Marina Bay (Singapore) photo below.
Blue hour photography is sometimes mixed up with night photography, which starts once dusk is over. You might be surprised to find out that night falls almost suddenly after dusk. It doesn’t even take 10 minutes for the blue hour sky at dusk to turn into pitch-black night.
Personally, I never shoot after dusk. Photos shot after dusk tend to come out very dark and colors look muddy as there is little bluish hue left in the sky. Your photos will look considerably different if you miss this prime time of blue hour even by a mere few minutes.
In fact, what we call blue “hour” seems to last only approximately 10 minutes towards the end of dusk (depending on where you are located relative to the equator).
Blue hour photography is quite a time-sensitive genre, as this prime time of blue hour sky ends in the blink of an eye. So, stay focused, otherwise, you could suddenly miss it passing you by under the fast-changing dusk sky. I really wish blue hour could literally last for an hour!
Editor’s note: it does in some parts of the world, at certain times of the year. If you want more blue hour time – travel farther away from the equator! Where I live in Canada blue hour is almost a full hour in the summer, versus 20 minutes where the author lives in Singapore.
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