stacking exposures

How I Got The Shot: Star Trails Over the Amphitheater, Bryce Canyon National Park

Star Trails Over the Amphitheater, Bryce Canyon National Park. Fujifilm X-T2, 10-24mm f/4 lens at 10mm. Light-painted with a Coast HP7. Two blended exposures of 1 second, f/8, ISO 200 and 15 minutes, f/5.6, ISO 100.

The Location

Bryce Canyon National Park is truly one of the wonders of our park system. It’s not as big or varied as some other parks, but what is has to offer is nothing short of astonishing.

Despite its name, Bryce Canyon is actually not a canyon at all. A canyon is the technical term for a gorge formed by a river. Bryce is instead a series of natural amphitheaters, or bowls, that line the eastern side of Utah’s Paunsaugunt Plateau. These bowls are filled with red, orange and white rock spires that were eroded into existence by water freezing into ice. These spires are called hoodoos. It’s the endless variety of these hoodoos that make Bryce so magical.

The Light

Standing on the rim of the canyon at one of the many overlooks affords the visitor with an awe-inspiring view. The sprawling amphitheater spreads out below you with the orange-red colors of the towering spires contrasting with the deep blue sky. This view is especially popular at sunrise as many of the viewpoints face directly east. How then, does one capture this incredible canyon at night?

As with any location, the first step is to decide which phase of the moon you would prefer to shoot in. Moonless nights (new moon) are great for photographing the Milky Way, but they leave the foreground completely black. On the other hand, moonlight (full, quarter or crescent) helps illuminate the foreground, but the brightness of the sky masks many of the dimmer stars. All phases of the moon are great to shoot under, so you just have to consider how much moonlight you actually want. My choice for Bryce would have been to shoot under some moonlight. Unfortunately for me, I was there during a new moon. Complete darkness.

Under these conditions, it made sense to concentrate on shooting the Milky Way, which I did on the first night. While I like some of those images, the lack of moonlight means I didn’t include the canyon because it was completely black. And the canyon is the hero of this location.

Figure 1. Milky Way over Bryce Canyon. Fuji X-T2, 10-24mm f/4 lens at 17mm. Twelve stitched frames shot at 30 seconds, f/4, ISO 6400.

Being in Bryce, I really wanted to include the canyon with the night sky. But how do we do that with no moon? I could have done a little painting on the foreground, which I did for the photo in Figure 2. This worked out well for some of the details, but it still did not show the entire canyon.

Figure 2. Light painting in a small area of the canyon. Fuji X-T2, 10-24mm f/4 lens at 10mm, Coast HP7.

To illuminate the entire canyon I needed something stronger than a flashlight. It needed to be the sun or the moon. Since I didn’t have the moon, I had to use the sun.

The Shoot

The next day I headed out in late afternoon to scout a location to shoot. Once I decided on the spot, I set up my camera and tripod and began fine-tuning my composition.

The goal here was to take one shot in the waning light of dusk and then another once the sky became completely dark. Back at home I would combine them together in Photoshop.

The trick was to get the right light on the canyon. Sunset would look fake if combined with the night sky, so I needed the illumination to look somewhat like moonlight. That time came around half an hour after sunset. This time of the day is called civil twilight and is great in its own right for making landscape images. (For more on this, see one of my previous posts, “Out of the Blue: The Importance of Twilight to the Night Photographer.”) I experimented with several exposures to find one that sort of looked like night. Figure 3 shows the exposure I ended up using for the final composite.

Figure 3. The canyon during civil twilight. 1 second, f/8, ISO 200.

Keeping my camera set up—not moving it one centimeter—I waited until complete darkness.

The kind of darkness I wanted begins at the time of evening called “astronomical twilight.” Depending on your latitude, this is somewhere between 1 to 1.5 hours after sunset. (Click here for a great description of the different types of twilights.)

Once the sky became completely dark, it was time to start experimenting with light painting. I changed my ISO to 100 and opened up my aperture to f/5.6 so I would capture more stars.

With these new settings I experimented with walking up and down the trail, painting as I went along. I determined that painting at an angle back toward the camera—while returning back up the trail toward my setup—created better texture in the lit areas. It also kept my silhouette from blocking the light on the trail. Had I painted while walking away from the camera, my body would have blocked some of the light from the camera’s view, thereby creating a blotchy effect.

Once I felt confident that my light painting approach was effective, it was time for the long shot. Figure 4 shows the 15-minute exposure that captured the star trails while I lit the trail.

Figure 4. Light painting during the long exposure. 15 minutes, f/5.6, ISO 100.

The Post-Production

Once I was back at the computer, it was time to put the images together in post-processing. I began in Lightroom by fine-tuning the exposure and white balance. Then with both images selected, I chose Photo > Edit In > Open as Layers in Photoshop. This command brings both of the images into Photoshop and combines them into one file, with each image as a separate layer.

Figure 5. The two images combined into one file in Photoshop.

Next I highlighted the upper layer by clicking on it. From the Blending Mode dropdown (the box that defaults to saying Normal), I chose Lighten. This blending mode automatically shows the brightest parts of all the layers it’s applied to (in this case, two layers). Voila! Now I could see the brighter canyon (lower layer) as well as the stars and the light painting (upper layer).

Figure 6. The Lighten blending mode revealing the brightest parts of each layer.

At this point I could have been done with the image. This technique works well for so many situations found in night photography, but in this case it needed a little tweaking. Because the sky was brighter at dusk during my first shot, that part of the scene also showed through when I applied the Lighten blending mode. To solve this problem, I clicked on the lower layer, made a selection of the sky with the Quick Selection Tool, and then created a Curves adjustment layer to darken the sky.

Figure 7. The Curves Adjustment over the bottom layer.

Figure 8. The Curves adjustment darkening the sky.

Because the Curves adjustment layer is below the stars layer, the adjustment does not affect the night sky. It darkens the sky only in the dusk layer. And now that the sky was darker in the dusk layer, only the stars layer would show through.

Then I needed to apply a little cleanup. The hard edge of the mask near the horizon looked a little odd, so I blurred the edge of the mask to smooth out the gradient of the curves adjustment. To do this, I clicked on the mask and increased the feather in the Properties dialog, as seen in Figure 9.

Figure 9. Feathering the mask to smooth out the transition of the curves adjustment.

At this point the bulk of the compositing was complete. Figure 10 shows the finished composite of the stars layer and the dusk layer.

Figure 10. The completed composite.

Once the images were put together I was able to judge the overall look of the picture. I felt it was still a bit dark and the color somewhat off, so using more adjustment layers in Photoshop, I fine-tuned the exposure and color.

Figure 11. The final image after fine-tuning white balance and exposure.

Wrapping Up

The moral of the story is that you can’t always get what you want, but if you try sometimes … well, you get the picture. Matching the locations, moon phase, time of year and our creative vision can be a daunting task—and sometimes an impossible task. But with creative thinking, and a full grasp of all of your available tools, you might just find you can get what you need.

Tim Cooper is a partner and workshop leader with National Parks at Night. Learn more techniques from his book The Magic of Light Painting, available from Peachpit.

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How I Got the Shot: Lighthouse Beams at Fire Island

Fire Island Lighthouse. Nikon D750, Irix 15mm f/2.4 lens. Nine exposures at 1/2 second, f/2.4, ISO 6400.

The Location

Lighthouses are the great sentinels of the sea and their true souls shine at night.

The northeast U.S. has some of the most famous lighthouses in the country. They’re mostly in New England, but here in New York we have a couple of noteworthy examples too, including the amazing Fire Island Lighthouse at the western end of Fire Island National Seashore.

We shot here a few times last fall, including twice with attendees of our New York Night Photography Summit. I created the above image on one of those nights.

Well, perhaps I should say I created this image partly on one of those nights, and partly at my desk at home—because this technique involves a fair amount of post-processing, which is what this installment of How I Got (er … processed) the Shot is all about.

The Shoot

The Fire Island Lighthouse has a rotating beam. When a lighthouse has a rotating light it gives us more opportunities to depict the beams at different widths, depending upon the length of our exposure—i.e., a longer exposure will capture more of the beam as it moves, thereby making the beam appear wider in the image.

So the first thing to consider is shutter speeds. For the Fire Island Lighthouse I experimented with everything from 1/4 to 4 seconds. The 1/4 exposures resulted in very narrow beams of light; the 1/2 exposures were obviously wider, and also (naturally) resulted in fewer beams to stack in post, and both those trends continued as the shutter speeds got longer. Each exposure generates a different interpretation of the lighthouse, so I always suggest exploring your shutter speeds first so you can figure out what works best for you.

You can see in my test shots how the width of the rotating lighthouse beam changes with longer shutter speeds. In these examples, 1/8 resulted in the narrowest beam, 1 second in the widest.

Once I settled on 1/2 as my favorite shutter speed, that determined my aperture and ISO. Of course, shorter shutter speeds at night generally mean you need to push the envelope on the other aspects of the exposure triangle—shooting with a wide-open aperture (f/2.8 or wider) and a higher ISO (3200 to 6400). These combinations will generally allow you to capture bright beams of light as well as adequate detail in the lighthouse structure and the foreground.

Another image of the Fire Island Lighthouse from the same night. This one is composed of 1/4-second exposures, which resulted in the narrower beams of light. Nikon D750, Irix 15mm f/2.4 lens. 20 stacked frames shot at 1/4, f/2.4, ISO 6400.

Once I was happy with my exposure—i.e., beams that are bright but not blown out—I set my camera to burst mode. To prevent camera shake, I used a cable release (the Vello Shutterboss II) to fire the shutter. I kept my finger on the remote’s trigger until the beams did a full rotation around the lighthouse. (If you need to take another longer shot for more detail in the foreground, you can do that as well.)

Once I captured the assets, I was able to blend them in Lightroom and Photoshop to get that multiple-beam effect.

The Processing

Processing all of those raw images together into the final version is not terribly complicated, but involves a few steps and some finessing. So we’ve put together this video to show how I brought the photograph to completion.

In the video I talk about everything from the planning to the execution to how to put it all together in post.

Wrapping Up

If you live near or are planning to visit a rotating-beam lighthouse for night photography, we highly recommend giving this a go. It’s a fun technique that can generate some very dynamic images.

When you do, please share your work! We’d love to see your photos in the comments section below or on our Facebook page.

Note: Did you like that video, and think you’ll like more? Consider subscribing to the National Parks at Night YouTube channel to get notified about all our new videos when they come out.

Gabriel Biderman is a partner and workshop leader with National Parks at Night. He is a Brooklyn-based fine art and travel photographer, and author of Night Photography: From Snapshots to Great Shots (Peachpit, 2014). During the daytime hours you'll often find Gabe at one of many photo events around the world working for B&H Photo’s road marketing team. See his portfolio and workshop lineup at www.ruinism.com.

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Mastering the Intervalometer for Night Photography and Long Exposures

If you've ever scratched your head, bamboozled by an intervalometer, then scratch no more! Well, at least watch this video first ...

You may not know I also have another job in the photo industry. I created a presentation about using an intervalometer to support a smaller technique class at the 2016 OPTIC Imaging Conference held by B&H Photo and Lindblad Expeditions. And it was so fun (and useful!) that I decided to make a video out of it so even more people could benefit.

For the TL;DR crowd:

Vello Intervalometers work from left to right. When configuring, make sure you check every one of them and keep in mind that they run in sequence:

  1. Delay
  2. Long
  3. Interval
  4. Number (Qty)

If something is awry, then chances are something was set in a screen you may not expect. Check out the video above for the full rundown and lots of examples.

See more about Matt's photography, art, workshops and writing at MattHillArt.com. Follow Matt on Twitter Instagram Facebook.

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