Oct 10, 2024
ROCHESTER, N.Y. (WROC) — With another chance to see the aurora incoming, and pictures of dazzling displays already filling our social feeds, it is a good time to remind you that what you see in photos will very often be very different from what you’ll see with the naked eye. According to Jim Zavislan, a professor at the Institute of Optics at the University of Rochester, as humans evolved we evolved to work in the light, and that’s where our eyes work best. When it’s dark, no matter the case we just won’t see as much. A camera on the other hand is far more adaptable than the average human eye.  “At night we have what's called scotopic vision, in which we actually don't have a very good color response,” said Zavislan. “Our eyes, again, are basically evolved from what is necessary for our own survival.”  Which meant at night, humans just needed to be able to see potential predators, as a result color in our fight to survive wasn’t a priority at least when it got dark. A camera on the other hand doesn’t have to wait for nature to make improvements. “Cameras, on the other hand, have electronic adjustability. They have a variable exposure time. They can integrate over multiple seconds, and they can also increase their relative gain, and this allows them to adapt to the circumstances that they're trying to photograph,” said Zavislan.  They’ve also gotten incredibly smarter. As the amount of information, in this case light, the camera takes in the better sensors and processors in the phone can work wonders. “One really important thing is, in today's modern cell phones, they're taking lots of images and they're processing. It's the processing that actually gives you the enhancement,” said Zavislan.  To help demonstrate this, Professor Zavislan set up an experiment where he used a special filter to dim the light from the projector by 2000 times. To the naked eye, much like if the aurora was happening you could see very little but through just an iPhone camera the color erupted. You can view it in the video above.  He also offered some tips on how best to capture the aurora, whether using just your phone, or an SLR camera. “Most modern Android and iPhone cameras, what I would recommend that you do is first focus it on something that's distant but has a sharp edge. Oftentimes cameras in an attempt to focus will get confused. So if you can go ahead and do that, I'd first encourage people to do a focus lock,” said Zavislan.  “Now if you're an amateur photographer and you have an SLR camera, then what you're going to want to go ahead and do is take your ISO rating up probably at least 800 if not higher and then go ahead and take some trial pictures of around 1 to 2 seconds. Again, if you're using an SLR camera, I'd strongly recommend a tripod.”
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