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Dark Night, Milky Way and Tasman Lake, New Zealand
Sony a7S II
Sony 12 – 24 f/4 G
ISO 10,000
f/4
30 seconds
This week I have New Zealand on my mind. In preparation for the New Zealand Winter photo workshop that begins next week, I started going through unprocessed images from prior New Zealand visits. I was actually looking for something else when I stumbled upon this Milky Way image from the 2019 trip, when Don Smith and I guided a group of Sony influencers around the South Island. I’d already processed a virtually identical composition of this scene back then, but since my Milky Way processing has evolved (improved), I decided to give it another shot.
Day or night, I love this Tasman Lake scene in particular because it so beautifully captures what I love most about New Zealand. We only do this workshop in winter, which of course leads to the inevitable question: “Why?” The simple answer is that the modest sprinkling of tourists, consistently interesting skies, and snowy peaks I love so much, are only possible in winter. I could go on and on with my answer, but since a picture is worth a thousand words, I’ll just save you some time and give you six-thousand words worth of examples. (You’re welcome.)
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Image may be NSFW.Clik here to view.
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But even once I convince skeptics that winter in New Zealand is in fact quite beautiful, I’m usually hit with a follow-up: “But isn’t it cold?” Sure it’s cold, but by most people’s expectations of winter, New Zealand’s South Island is actually quite mild—with average highs in the 40s and 50s, and lows in the 30s, it’s similar to winter in Northern California and Oregon. I would venture that there’s not a single person reading this who doesn’t already have in their closet enough winter warmth to ensure cozy comfort in a New Zealand winter. Also like Northern California and Oregon, in winter New Zealand’s South Island gets rain and fog in the lowlands, and snow in the mountains, conditions I find so much better for photography (and for just plain being outside) than the sweltering blank-sky California summers I left back home.
All that said, for me the strongest argument for winter in New Zealand is Southern Hemisphere’s night sky. Inherently pristine air and minimal light pollution makes New Zealand is an astrophotographer’s paradise any season. But winter is when the Milky Way’s brilliant core shines in the east after sunset, already much higher above the horizon than my Northern Hemisphere eyes are accustomed to. The galactic core remains visible all night, ascending further and slowly rotating westward, before finally fading on the other side of the sky in the pre-sunrise twilight. That means more than 12 hours of quality Milky Way time, and the ability to place it above landscapes facing east, north, or west, by simply choosing the time of night you photograph it. And joining the celestial show are the Large and Small Magellanic Clouds—satellite galaxies of our Milky Way, only visible in the Southern Hemisphere.
Benefiting from our years of experience on the South Island, Don and I have identified many very nice locations for photographing the Milky Way, but our two favorites feature the galactic core above glacial lakes that are bounded by snowy peaks. One of these is on the shore Lake Wakatipu near Queenstown; the other is a vista above Tasman Lake in Mt. Cook / Aoraki National Park. This week’s image, from the 2019 trip, is of the Tasman Lake scene.
From the very first time my eyes feasted on it, I marveled at what a spectacular place the Tasman Lake view would be to photograph the Milky Way. In 2019, Don and I were especially pleased to be guiding this group of young photographers who were as excited about photographing the Milky Way as we were, so this shoot was in our plan since before the workshop started.
The sky this evening was crystal clear, but as the sky darkened, I found myself still down at the foot of the lake (just out of the frame on the far right), where I’d photographed sunset with most of the group. The majority decided to stay put for the Milky Way shoot, and while I couldn’t deny that this spot would likely be no less spectacular, I couldn’t pass the opportunity at the elevated lake view that had been on my radar for so long. I also thought the Milky Way would align better with the most prominent peaks from this vantage point. So I scrambled back up the boulders to the trail and race-walked more than a mile, then scaled more than 300 stairs in near darkness, to get in position.
I expected to find the few who weren’t down at the lakeside sunset spot (this group always scattered) would already be up here, but I arrived to find the view empty. While I was happy to eventually have the company of a couple of others, the utter solitude I enjoyed for the first 30 minutes felt downright spiritual.
Going with my dedicated night camera, the Sony a7S II, I started with my default night lens at the time, the Sony 24mm f/1.4. But the scene was so expansive, I quickly switched to my Sony 16-35 f/2.8 GM for a wider view. While that did the job for a while, it wasn’t long before I found myself wanting an even bigger view, so I reached for my Sony 12-24 f/4 G lens. Because light capture is the single most important factor in a Milky Way image, in general I find f/4 too slow. (Today I’d use my 14mm f/1.8 or 12-24 f/2.8, but back then those lenses were still at least a year away.) But really wanting the widest possible view, I rationalized that since the a7S II can handle 10,000 ISO without any problem, and the star motion of a 30-second exposure at 12mm would be minimal, and just went for it. Mitigating the f/4 exposure problems was the fact that the best parts of the scene’s foreground, the snow and water, were highly reflective, while the dark rock wasn’t really essential to the scene.
The result as processed in 2019, while noisier than ideal, was still usable. But as time passes, I’ve become less and less thrilled with many of my old Milky Way processing choices—that image was no exception. Since I’ve been pretty thrilled with the results reprocessing old Milky Way images with Lightroom’s latest noise reduction tool, I thought this might be a great time to reprocess this old scene to see if I could do it better.
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For no reason in particular, I chose different image to process, but the compositions are nearly identical. As expected, the new Lightroom noise reduction did a much better job minimizing the inevitable noise that comes at 10,000 ISO, so I was already ahead of the game. The only other major processing improvement I made was the color of the sky, which, as my night sky processing evolves, I’m making much less blue.
Because no one knows what color the night sky supposed to be when given the amount of exposure necessary bring out foreground detail, I’ve always believed that the color of the sky in a Milky Way image is the photographer’s creative choice. I mean, scientists might be able to tell you what color it should be (there’s a very strong case for green), but to me the bottom line is image credibility (and green just won’t do it).
Whatever night sky color I’ve ended up with has entirely a function of the color temperature I choose when I process my raw file in Lightroom—no artificially changing the hue, saturation, or in any other way plugging in some artificial color. Since I do think the foreground (non-sky) of a night image looks more night-like (I don’t want a night image that looks like daylight with stars) with the bluish tint I get when the color temperature is cooled to somewhere in the 3000-4000 degrees range (photographers will know what I’m talking about—non-photographers will just need to take my word), for years I cooled the entire image that way—hence the blue night skies. But Lightroom now makes it super easy to process the sky and foreground separately and seamlessly, so I no longer cool my night skies nearly as much as before (or at all). Now my night skies tend to be much closer to black, trending almost imperceptibly to the purple side of blue (avoiding the cyan side).
Oh, and the color of Tasman Lake you see in this image is real, I swear—the color of the South Island’s glacial lakes is another reason to love this country, but that’s a story for another day.
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This year’s New Zealand workshop is full, but Don and I will do it again next year.
New Zealand After Dark
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