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Dear AstroBinners, There is an aurora alert! I'm thinking of going to the woods to try capturing it. Yet I only have an iPhone and a star tracker. What are my chances? Can you get a good image of Aurora with a 30sec iPhone exposures? What settings should I use? Should I use the star tracker to track the sky in order to have pinpoint stars on the background of aurora? Has anyone tried that? |
3.15
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30 seconds is way too long for active Aurorae and you really dont need the tracker, just mount the phone on a tripod somehow (rubberbands, zipties, whatever, it doesnt need to be high tech). These high alert type events often result in fast moving "curtain" like filaments that move across several degrees in a matter of seconds, so really you have to be there to see how long is too long but 30 seconds is definitely too long by a factor of at least 4. If you are on the southern end of the area that is forecasted to get aurora then maybe you could go 30s, they will not be moving that fast if they are only seen at the horizon. |
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| Is it better to use an iPhone or a 533 sensor camera with some lens? |
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3.15
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Alien_Enthusiast: The wider the better, so the phone. If you have some ultra wide 10mm focal length lens then maybe the 533, but that sounds like a pain to set up. |
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| Hello, I just took one in Normandy with an Iphone 12 at 10s night mode. 30s would be certainly too long, as 10s already provides a bright picture. To give an idea, I am at 49N, this is quite low for aurorae, but this one was exceptionnal. Half of the sky was illuminated, you could see the green and even some red with your neked eye after some minutes in the dark, very impressive. |
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3.15
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| Here in 60N we had very obvious bright purple naked eye aurora a couple hours ago. From bortle 8 that is, and it should be said that at this time of year there is no darkness, only nautical twilight and they were still incredibly bright - purple on a dark blue sky, not seen that one before. We are going to see a whole bunch of amazing aurora images posted over the weekend. |
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It did work out! Here is one of many images; https://www.astrobin.com/4e5g9e/ |
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Btw if I have hundreds of frames, and I want to turn them into a video, what software would be ideal? (Frames are pre-aligned) Preferably something that doesn't crop data quality too much |
2.41
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Yeah...and here is my try from yesterday by iPhone 13pro  several pictures in revisions table. Each picture is like 1x 3sec exposure from hand...forget about hundreds of them...you don´t need it.https://astrob.in/x8h881/0/ |
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Alien_Enthusiast: PIPP can turn stills into a video, and doesnt reduce quality if you choose uncompressed file formats for output. https://pipp.software.informer.com/ Be warned though, the file size will be quite large that way. But give it a try. Here is what it looked like in the middle of a city in 60N at nautical twilight:  |
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another one : ) https://www.astrobin.com/7hld57/ |
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Should be good shooting in Pro mode or raw for like 20 seconds or so. I was successful propping the phone up on the ground and just taking a 20 second exposure with my s22 ultra. This photo was in March at about 68° Lat, but same concept. 20 sec at f/1.8 ISO 160. |
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Here’s what I got just holding it tight. 1.1 second iPhone 12. 33.9 degrees north. |
