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Thread: Skyscape

  1. #1
    Founder Member Chocky's Avatar
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    Default Skyscape

    This rainbow was right accross the sky in in a sort of Horizontal arc of a ring like you would see it from am aircraft. It was most strange
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  2. #2
    Founder Member Chocky's Avatar
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    Nikon D7200 Camera. Nikon 55-300mm VR F4.5-5.6G ED AF-S DX NIKKOR SWM WAF-5 DX Micro Nikkor 40mmf/2.8G SWM DX swm ED af aspherical 18-55 With wide angle converter Nikon Coolpix S5100 Sony HandycamDCR-SR58 Hama tripod Canon Pixma iP7250 PixmaMG5500

    Default

    Apparently this is a phenomenon called a Circumzenithal arc (CZA) And they are always upside down. it arises from refraction of sunlight through horizontally-oriented ice crystals,generally in cirrus clouds, rather than from raindrops.

    Unfortunately this photo has a lot of lower clouds in front impairing it's clarity

    Circumzenithal arc - Wikipedia, the free encyclopedia
    Last edited by Chocky; 03-12-2009 at 12:02 AM. Reason: Spelling

  3. #3
    Super Moderator Catherine's Avatar
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    That's very interesting, Beryl! Really clever of you to film it - then find out what it was!

  4. #4
    Founder Member Chocky's Avatar
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    Nikon D7200 Camera. Nikon 55-300mm VR F4.5-5.6G ED AF-S DX NIKKOR SWM WAF-5 DX Micro Nikkor 40mmf/2.8G SWM DX swm ED af aspherical 18-55 With wide angle converter Nikon Coolpix S5100 Sony HandycamDCR-SR58 Hama tripod Canon Pixma iP7250 PixmaMG5500

    Default

    Yes Thanks Catherine .
    It's quite fascinating and they are not often seen as they are so high

  5. #5
    Slightly Mad Moderator ladylouise62's Avatar
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    Default

    I've never heard of that... and well done for catching it - it's hard to get any rainbow, let alone an upside down one

  6. #6
    Founder Member Chocky's Avatar
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    Thanks Louise
    They are rarely seen as they don't last long . I have seen a few that are side arced but most are upside down so to speak and the colours a re much brightr as they don't overlap due to the ice crystals as apposed to droplets of rain
    Just a pity about the lower clouding

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