Catching the Edge of the Aurora Borealis

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JSBach1801 United States of America
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Catching the Edge of the Aurora Borealis

#1

Post by JSBach1801 »


First, let me give a HUGE shoutout to @JayTee! I had no idea that there was a possibility of an Aurora, but he clandestinely let me know. I couldn't see anything from my apartment, so I grabbed my camera case (always ready to go!) and headed to a semi-dark site. Still couldn't see much with the naked eye, but the camera sees all. Didn't really have much structure to it, more just a faint glow, but it was my first aurora ever (grew up in Texas), so I was thrilled!

I took a bunch of pictures, but this was my best result. It is a six frame pano, merged in Photoshop and color corrected almost entirely with the Camera Raw filter. I think it turned out fantastic, and I'm really happy with it! For the best view, click on the pop-out option.

Sony a7IV, Canon 50mm f/1.8, 2500 ISO, 6 second exposures

There were quite a few other people out taking pictures too. Some of them had some pretty high dollar cameras, but no idea how to use them. :lol: I spent about twenty minutes helping one group adjust the settings on their Canon camera. They didn't even know how to adjust the shutter speed, :?



Last edited by JSBach1801 on Mon Apr 24, 2023 8:37 pm, edited 1 time in total.
Lyle In Utah

Telescopes: William Optics Zenithstar 73 III APO, ZWO 30mm f/4 Mini Guide Scope
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Re: Catching the Edge of the Aurora Borealis

#2

Post by bobharmony »


That is a beauty, Lyle. Congrats on your first aurora! Of course with best chance for viewing in New England in q United a while, it figures I'm sitting in Central Florida ATM.

BOB
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Re: Catching the Edge of the Aurora Borealis

#3

Post by Juno16 »


That’s a beautiful image Lyle!

Great effort in get out there and capturing the scene. It was well worth the effort!
Jim

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Re: Catching the Edge of the Aurora Borealis

#4

Post by messier 111 »


very very nice , thx .
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Re: Catching the Edge of the Aurora Borealis

#5

Post by JayTee »


WOW Lyle,

That is the result I dreamed of imaging but was completely clouded out. I nearly had tears from disappointment that I could not image what you so beautifully accomplished.

Thank you for sharing.

This real-time forecast is what drove me to contact Lyle. I have never been in the red before. This is a screenshot from Aurora Pro on Android.

4_23 Aurora Map RED.jpg
∞ Primary Scopes: #1: Celestron CPC1100 #2: 8" f/7.5 Dob #3: CR150HD f/8 6" frac
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Re: Catching the Edge of the Aurora Borealis

#6

Post by JSBach1801 »


JayTee wrote: Mon Apr 24, 2023 8:27 pm WOW Lyle,

That is the result I dreamed of imaging but was completely clouded. I nearly had tears from disappointment that I could not image what you so beautifully accomplished.

Thank you for sharing.

This real-time forecast is what drove me to contact Lyle. I have never been in the red before. This is a screenshot from Aurora Pro on Android.
I owe you one, JT.
Lyle In Utah

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Re: Catching the Edge of the Aurora Borealis

#7

Post by JSBach1801 »


A couple of single frame follow ups that were kind of cool. The streak of light across the bridge was a car passing while the image was taking.





Lyle In Utah

Telescopes: William Optics Zenithstar 73 III APO, ZWO 30mm f/4 Mini Guide Scope
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Re: Catching the Edge of the Aurora Borealis

#8

Post by JayTee »


Hi Lyle,

Some tips about wide-field nighttime imaging that might help. Because your Sony DSLR has a full-frame sensor, some basic rules apply.
1) You can use the rule of 500 for determining how long (approximately) your unguided images can be before star trailing becomes apparent. The rule basically states that you take the FL of the lens you're using and divide that into 500 (use 300 for an APS-C sensor). In your case that was a 50mm lens, so 500 divided by 50 = 10 seconds of exposure time.
2) With the max calculated exposure time you can now decide where to put your ISO setting. Although the Sony A7 IV has a very good low noise sensor at higher ISO settings, you still get a dynamic range increase with each successive lower ISO setting you choose.
3) This is just knowledge (stuff) you mess around with to determine what works best for you.

Hope this helps.
∞ Primary Scopes: #1: Celestron CPC1100 #2: 8" f/7.5 Dob #3: CR150HD f/8 6" frac
∞ AP Scopes: #1: TPO 6" f/9 RC #2: ES 102 f/7 APO #3: ES 80mm f/6 APO
∞ G&G Scopes: #1: Meade 102mm f/7.8 #2: Bresser 102mm f/4.5
∞ Guide Scopes: 70 & 80mm fracs -- The El Cheapo Bros.
∞ Mounts: iOptron CEM70AG, SW EQ6R, Celestron AVX, SLT & GT (Alt-Az), Meade DS2000
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∞ Binos: 10X50,11X70,15X70, 25X100 ∞ AP Gear: ZWO EAF and mini EFW and the Optolong L-eXteme filter
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Re: Catching the Edge of the Aurora Borealis

#9

Post by JSBach1801 »


JayTee wrote: Mon Apr 24, 2023 11:38 pm Hi Lyle,

Some tips about wide-field nighttime imaging that might help. Because your Sony DSLR has a full-frame sensor, some basic rules apply.
1) You can use the rule of 500 for determining how long (approximately) your unguided images can be before star trailing becomes apparent. The rule basically states that you take the FL of the lens you're using and divide that into 500 (use 300 for an APS-C sensor). In your case that was a 50mm lens, so 500 divided by 50 = 10 seconds of exposure time.
2) With the max calculated exposure time you can now decide where to put your ISO setting. Although the Sony A7 IV has a very good low noise sensor at higher ISO settings, you still get a dynamic range increase with each successive lower ISO setting you choose.
3) This is just knowledge (stuff) you mess around with to determine what works best for you.

Hope this helps.

JT, in order to intentionally capture the car's headlights streaking across the whole frame, I increased the exposure time on purpose. I knew it would create some modest star trails, but that was an understood trade off to get the shot I wanted.

For the other frames where no cars were crossing, my exposure times were set at what I considered the best balance to minimize star trailing and to minimize noise. I took dozens of shots in the field, not just the ones shown here, testing and experimenting.

The results you see are intentional, and what I wanted.
Lyle In Utah

Telescopes: William Optics Zenithstar 73 III APO, ZWO 30mm f/4 Mini Guide Scope
Cameras: Sony a7IV Mirrorless, ZWO ASI120MM-MINI
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Re: Catching the Edge of the Aurora Borealis

#10

Post by JayTee »


JSBach1801 wrote: Tue Apr 25, 2023 12:54 am The results you see are intentional, and what I wanted.
Very cool and nice work! That is exactly how I proceed. Although, I'm willing to accept mild star trailing just to get those last few photons.
∞ Primary Scopes: #1: Celestron CPC1100 #2: 8" f/7.5 Dob #3: CR150HD f/8 6" frac
∞ AP Scopes: #1: TPO 6" f/9 RC #2: ES 102 f/7 APO #3: ES 80mm f/6 APO
∞ G&G Scopes: #1: Meade 102mm f/7.8 #2: Bresser 102mm f/4.5
∞ Guide Scopes: 70 & 80mm fracs -- The El Cheapo Bros.
∞ Mounts: iOptron CEM70AG, SW EQ6R, Celestron AVX, SLT & GT (Alt-Az), Meade DS2000
∞ Cameras: #1: ZWO ASI294MC Pro #2: 662MC #3: 120MC, Canon T3i, Orion SSAG, WYZE Cam3
∞ Binos: 10X50,11X70,15X70, 25X100 ∞ AP Gear: ZWO EAF and mini EFW and the Optolong L-eXteme filter
∞ EPs: ES 2": 21mm 100° & 30mm 82° Pentax XW: 7, 10, 14, & 20mm 70°

Searching the skies since 1966. "I never met a scope I didn't want to keep."

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Re: Catching the Edge of the Aurora Borealis

#11

Post by Lady Fraktor »


A great job Lyle, outstanding images!
Gabrielle
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Re: Catching the Edge of the Aurora Borealis

#12

Post by Makuser »


Hi Lyle. A very nice gallery of your Aurora Borealis images. Wonderful framing and lots of foreground details as well as the beautiful celery green color aurora display. Thanks for sharing these captures with us Lyle and and keep up the great imaging work.
Marshall
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