Five Questions: Barns, Filters with Auroras, Star Trail Settings and More

The night photography world is full of questions, and we’re happy to help with answers.

This installment of our “Five Questions” series features inquiries about photographing barns on the Blue Ridge Parkway, coma with Nikon Z lenses, moving a Lightroom catalog on a Mac, using filters when shooting auroras and settings for star trails.

If you have any questions you would like to throw our way, please contact us anytime. Questions could be about gear, national parks and other photo locations, post-processing techniques, field etiquette, or anything else related to night photography. #SeizeTheNight!


1. Clapboard on the Blue Ridge Parkway

Question:

I am thinking about traveling to the Blue Ridge Parkway to do some star photography and would love to do some light painting of old barns or structures. I am wondering if you have any locations you can recommend. — Michael S.

Mabry Mill, Blue Ridge Parkway. © 2021 Chris Nicholson. Nikon D5 with a Nikon 24-70mm f/2.8 lens, lit with four Luxli Fiddle LED panels. 30 seconds, f/2.8, ISO 6400.

Answer:

The Blue Ridge Parkway is a great place to find barns! But many are on privately owned or leased farms along the parkway; you could still shoot those, but would want to ask permission of course, especially if photographing them at night, and absolutely if you’re going to light paint them.

Sticking to barns that are not privately owned, here are some tips:

Stay north of Asheville. The section of the parkway south of Asheville (and even for a bit north) is mostly mountainous. The northern two-thirds of the parkway—perhaps safely stated as “north of the Linn Cove Viaduct”—is more rural and agricultural.

If you’re open to just historic clapboard structures that aren’t barns, you can’t drive more than a few miles without seeing some. These come to mind immediately: Mabry Mill, Puckett Cabin, Brinegar Cabin. Lots of others scattered about.

For barns in particular, off the top of my head: the Johnson Farm at Peaks of Otter (you’ll need to hike to it), Explore Park (though you’ll want to ask about access after 8 p.m., as it’s managed by the city of Roanoke) and the farm at Humpback Rocks Visitor Center. — Chris

2. Non-Coma Z Lenses

Question:

I just switched to the Nikon Z 6II and am looking for a recommendation for a lens without coma distortion. I have tried and returned two Rokinon 14mm f/2.4 lenses with severe coma. My preference would be a lens in the 14-24mm range. — Edmund

Answer:

You are going to love the Z 6II! The FTZ adapter works well, so it gives you lots of options, but both the Nikon Z 14-24mm f/2.8 and Nikon Z 24-70mm f/2.8 are among the very best lenses Nikon has ever produced. Pricey, but worth it. Another option (assuming you have the FTZ adapter) is the Nikon’s F-mount 14-24mm. There is nothing better than those three lenses at this time. — Lance

3. Moving Lightroom on a Mac

Question:

Is there a simple way to migrate Lightroom files on a Mac? I will soon have to bring in a new and larger external hard drive. — Julie P.

Answer:

Yes, and the process is actually pretty simple.

  1. With Lightroom closed, plug in the old drive and the new drive.

  2. Copy all of the information from the old drive to the new drive.

  3. Unplug your old drive and launch Lightroom. You will see question marks next to your folders, because Lightroom can no longer find your old hard drive.

  4. You need to locate the parent folder for your images. In Lightroom, navigate to the topmost folder in your Folders hierarchy. That may well be the parent folder, but it’s possible that the true parent folder is hiding above it. By right-clicking on that topmost folder, you will see an option to Show Parent Folder. This command will show the folder containing that topmost folder, if there is one.

  5. Right-click on your parent folder and choose Find Missing Folder. Lightroom will open your system’s Finder.

  6. Navigate to the new drive, then choose the matching parent folder and click Choose.

The parent folder and all of its subfolders (all on the new hard drive) will now be linked back with Lightroom. — Tim

4. Light Pollution Filters and Auroras

Question:

I just read your article on light pollution filters. Will these filters also be usable when shooting Northern Lights? — Claron K.

Answer:

Yes, I believe they would be useful for shooting Northern (or Southern) Lights when near inhabited areas. As auroras tend to be green, pink, purple and sometimes blue, the orange/yellow blocking ability would have a complementary effect. However, you could be lose up to 1 stop of light, so keep that in mind. — Matt

5. Star Trail Settings

Question:

I just reviewed your “How I Got the Shot: Lake McDonald” blog post about star trails. Phenomenal image! I have done a ton of research on how to do this kind of photo, but was hoping for a simple recommendation for settings and timing. I’ll be shooting with either a Nikon D850 or a Nikon Z 6 with a 14-24mm lens. — Darlene

Star Circles Over Lake McDonald. © 2015 Gabriel Biderman. Fujifilm X-T1 with a Fujifilm 10-24mm f/4 lens. 41 stacked frames, each shot at 2 minutes, f/4, ISO 3200.

Answer:

There is no simple formula for star trails. You need to find the balance between a proper base exposure, how long you want to go, and image quality.

You can capture trails with either one long exposure or with multiple shorter exposures that you later stack in Photoshop. Single exposures are often best for up to 15-minute shots, but when you want longer trails you’ll most likely want to shoot multiple frames to stack.

Do a high ISO test shot to figure out the proper exposure. Then you want to get to a more optimal image quality setting. Lower your ISO to something you’re comfortable with in terms of noise (for example, maybe ISO 800), and then adjust your shutter speed accordingly to compensate.

Also consider apertures, in this regard: The wider the aperture, the higher number of stars will appear. While that might sound like a good thing, too many star trails could look too chaotic and distract from the rest of the scene. For example, on a dark night f/2.8 will show an overwhelming number of trails, while f/8 would create a more subtle effect. Under a full moon this isn’t so critical, as not as many stars are visible anyway. Either way, just be careful that you don’t stop down so much that you have to crank up your ISO and sacrifice image quality.

Another consideration is how long your camera’s shutter can be open without generating long-exposure noise (speckled red, blue and green confetti-like specks in your image). This noise is produced when a camera processor overheats during long exposures, but higher outdoor temperatures and lower humidity also play a factor. You have to learn what your camera can tolerate by running some tests in different conditions. For example, if the ambient temperature is 60 to 65 F or less then you can usually get away with 4- to 6-minute exposures, but if the temperatures are 80 F or higher then you might be limited to 30 seconds or 1 minute.

To counteract that effect, you might wonder about using long-exposure noise reduction (LENR). You can use that quite effectively if you’re shooting one long exposure for star trails, but it would be countereffective for stacking. The reason is that for most cameras, LENR disables the shutter after each exposure (for the same amount of time as the shutter speed), which would create breaks in your star trails.

The final decision is how long you want your star trails to be. When facing north for circumpolar trails, you want to shoot for at least 1 hour, and the longer the better. If you are facing east, west or south, you can get away with shorter total exposures—8 to 30 minutes might be sufficient. — Gabe

Chris Nicholson is a partner and workshop leader with National Parks at Night, and author of Photographing National Parks (Sidelight Books, 2015). Learn more about national parks as photography destinations, subscribe to Chris' free e-newsletter, and more at www.PhotographingNationalParks.com.

UPCOMING WORKSHOPS FROM NATIONAL PARKS AT NIGHT