Articles for the Month of July 2020

A Birder Photographing Comet Neowise

I’m not really an aficionado of star-gazing and the like. For one…I’m an early-to-bed, early-to-rise kind of a guy! That’s a big shift from where I was 20+ years ago, but as a birder, getting up early and driving a few hours to get to a favorite location at dawn has become old hat for me. Because of my early hours, staying up late to go star-gazing well after sunset just isn’t…me.

However, as an aficionado of the amazing wonders nature has to offer, I WILL make the effort for special events. I do remember Comet Hale-Bopp from 1997, a comet so bright it was not only boldly visible with the naked eye, but it maintained a presence in night sky for several months. In July of 2018, my son and I also made an 8-hour drive to eastern Wyoming to ensure cloud-free weather for observing a total eclipse, an event that may only occur within driving distance a handful of times in a lifetime.

Now, it’s Comet Neowise that’s grabbing headlines. Neowise isn’t nearly as bright as Hale-Bopp was, nor will it be with us for such an extended period of time. However, it is being touted as the brightest comet since Hale-Bopp, and given the 20+ years since a comet has made such a splash, I have gone out multiple times to observe and try to photograph the comet (more on the latter in a second).

I admit though that my first observation was mostly by accident! Last weekend I was going to go birding in the central part of the state. As I often do when birding, I got up a couple of hours before sunrise and starting making the ~3 hour drive to the Fort Pierre National Grasslands. I’d read about Neowise, but I admit it wasn’t until I was half an hour outside of town that I “remembered” I might have a chance to see a comet in the pre-dawn light.

I exited the interstate and stopped, pulling out my phone to look up where to search for the comet. “Northeastern sky, an hour+ before dawn, low on the horizon.” By serendipity, my timing was perfect, and I had perfectly clear weather. I started heading down a gravel road, turned a corner onto another road, and…there she was! I’d read binoculars would possibly be required to initially spot it, but once you knew where to look, you could see it with the naked eye. Nope! It was VERY obvious in the northeastern sky, no searching required, no binoculars required! I excitedly observed it for a few minutes, then positioned myself to take some photos.

Or at least I tried! I have a window-mount with a ball-head on top where I can mount my camera for stability, something I knew I’d obviously need for taking a long-exposure photo of a comet. But as a bird photographer? I have no clue how to shoot a comet. I did manage some halfway decent photos, but they were pretty much the equivalent of going birding, seeing a great bird, and getting “record shot”…a photo of dubious quality, but clear enough to document what you’ve seen.

I’ve since taken my son out to see his first comet, and another trip to specifically try to photograph it. Since my first early morning view, Neowise has “moved”, if you will, now primarily being visible in the northwestern sky an hour+ after sunset. It’s also become quite a bit less bright than what I remember from my first sighting. While I could immediately see, track, and observe Neowise with my naked eye that first day, I had more trouble finding it and keeping track of where it was in the sky on this trip. Still clearly visible however, and a target for a photo!

The photo below is the best I’m ever going to get with my current equipment. I shoot a DSLR, a Canon 90D, and for lenses, I rarely take off my 100-400mm II IS lens, a great birding lens with some versatility in the zoom. When shooting the eclipse in 2018, I didn’t have this lens…I used a much older, but very sharp, 400mm prime. I almost wish I had brought that lens instead, as for that one, you can manually focus on “infinity” for a shot like this, and ensure you’re pretty sharp for this kind of photography. With my 100-400 zoom, it’s not as simple as manually setting focus to infinity, as that sweet spot of focus differs depending on zoomed focal length. The biggest problem trying to shoot this night…with such a faint (to the eye) target, and old eyes suffering from Sjogren’s Syndrome, I couldn’t see well enough to be sure I was getting a clear focus.

My strategy was thus…1) window mount the camera 2) find the comet in the sky 3) frame the composition to my liking 4) manually focusing as best I could, and 5), continually fiddle with the focus in the hopes that at least a FEW of my shots were in focus.

I also knew from my few previous attempts at shooting stars, auroras, the moon, etc. that without any kind of special tracking hardware, I had to keep my exposure time to 20 seconds or less. Even at 20 seconds, there’s enough of a rotation of the earth so that the stars appear to “move” in that time period, and instead of clear, crisp points of light for stars, you get short little star trails. To get enough light recorded on the sensor in a short amount of time at night also means using ISO levels far higher than what I normally would do! More ISO means more noise, but it was unavoidable in this situation.

FWIW my final info for the shot below:

  • 100mm focal length, keeping my zoom the widest available view
  • 10-second exposure @ f/6.3
  • ISO 6400…what it took to get enough light to see clearly see both stars and the comet.

That’s it! Throw in some noise reduction in Photoshop, and this is the result! I’ll definitely take it! I’m certainly not going to ever compete with those more experienced in astrophotography, but I saw my “bird” and got that “record shot” to prove it. 🙂

Comet Neowise - by Terry Sohl
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