otoien Posted December 6, 2020 Share Posted December 6, 2020 I think this might be the first time I have seen full spectrum captures (IR + visible bands, no mention of UV) of auroras: https://kolarivision...tian-obermeier/ Link to comment
Stefano Posted December 6, 2020 Share Posted December 6, 2020 Interesting, never saw this. I bet auroras also emit UV light. Maybe some member in the right latitudes may try photographing them in invisible light? Link to comment
nfoto Posted December 6, 2020 Share Posted December 6, 2020 I might try Aurora borealis in UV with a modern camera for which the ISO can be cranked up to astronomical (sic) levels... If there is an opportunity to travel again... Meanwhile, here is an IR version from the Lofoten archipelago, with my IR D200 and the 18/4 Nikkor. The IR bands were not very bright thus I had already ISO 1600 for 30 secs here, with the lens at f/4. Link to comment
otoien Posted December 6, 2020 Author Share Posted December 6, 2020 Here is my own version of aurora in IR with my D40x IR-720nm, Nikon 12-24mm @ 13mm and f/4, 28s at ISO800. (This would be a pretty normal exposure for medium strength aurora in the visible spectrum.) Somehow I feel that the IR version of the aurora needs to be presented a little on the warm side: Link to comment
dabateman Posted December 7, 2020 Share Posted December 7, 2020 Wow these are great.I wonder if like rainbows the UV, visible and IR can be captured. Link to comment
Stefano Posted December 8, 2020 Share Posted December 8, 2020 Yes, they can: https://www.ultravioletphotography.com/content/index.php/topic/2420-rainbow-in-uv-and-ir Link to comment
dabateman Posted December 8, 2020 Share Posted December 8, 2020 Yes, they can: https://www.ultravioletphotography.com/content/index.php/topic/2420-rainbow-in-uv-and-ir No I know about rainbows. I was saying if Aurora is like a rainbow with the full spectrum. For rainbows this was excellent https://www.ultravioletphotography.com/content/index.php/topic/3205-a-double-rainbow/page__hl__%2Brainbow+%2Buv__fromsearch__1 Link to comment
OlDoinyo Posted December 9, 2020 Share Posted December 9, 2020 The visible aurora is dominated by green emission from nitrogen, with a bit of red from oxygen. In the IR, I wonder what we are seeing. I presume this is taken with something like an R72 filter? Aurora-like discharges in the vacuum UV have been documented on Jupiter and Saturn, and around comets; but references to terrestrial aurora discharges in this band are hard to find. On a sillier note, someone is hawking this product! Link to comment
dabateman Posted December 9, 2020 Share Posted December 9, 2020 So UV aurora smells like peppers and vanilla. Maybe that's why few have photographed it. Link to comment
Stefano Posted December 9, 2020 Share Posted December 9, 2020 About UV auroras, I posted this a while ago. Link to comment
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