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Great Bow here this evening!

  • paulevans
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Great Bow here this evening! was created by paulevans

Took this a couple of hours ago from my house in Larne. Pretty big, so zoom in and pan across!

It's a composite of four shots taken in portrait mode stitched in Panorama Plus 2.

www.pevans.me.uk/images/rainbow070726web.jpg

Clear skies,

Paul.
14 years 9 months ago #49104

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Replied by ayiomamitis on topic Re: Great Bow here this evening!

Paul,

That is VERY impressive. Send it to SpaceWeather! :wink:
Anthony Ayiomamitis
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14 years 9 months ago #49105

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Replied by wellbuttie on topic Re: Great Bow here this evening!

super double bow there Paul........ most excellent
Steve Roche
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14 years 9 months ago #49106

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Replied by voyager on topic Re: Great Bow here this evening!

That is absolutely superb! One of the best rainbow shots I've ever seen.

What camera did you use and what settings?

Bart.
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14 years 9 months ago #49111

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Replied by michaeloconnell on topic Re: Great Bow here this evening!

Superb image Paul!

Speaking of rainbows, I have noticed quite a few of these lately with all the wet weather. While driving the car, I usually wear prescription polaroid sungalasses. I noticed that the top half of rainbows are diffuclt to see with polaroids on while the bottom portions near the ground are easy to see. Anyone able to explain why this is the case?

Cheers,
14 years 9 months ago #49112

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Replied by voyager on topic Re: Great Bow here this evening!

Superb image Paul!

Speaking of rainbows, I have noticed quite a few of these lately with all the wet weather. While driving the car, I usually wear prescription polaroid sungalasses. I noticed that the top half of rainbows are diffuclt to see with polaroids on while the bottom portions near the ground are easy to see. Anyone able to explain why this is the case?

Cheers,


The light in a rainbow is polarised. As you go round the circle the angle of polarisation changes. The bits that are closer to 90 degrees polarised with respect to your glasses will be almost invisible.

That make sense?

Bart.
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14 years 9 months ago #49114

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Replied by paulevans on topic Re: Great Bow here this evening!

Thanks guys! It was a hastily grabbed shot as I wasn't sure if it would last. The camera was setup for astrophotography so I quickly turned down the ISO and stuck it on Aperture Priority. Now this was wrong as what I'd normally do is take some meter readings and settle on a fixed manual exposure - the automatic has resulted in 2/3rds stop variation over the four used to stitch up.

Camera was my Minolta Dynax 5D, 28-135 lens at 28mm f8, ISO 100 shutter speeds between 1/500th-1/800th.

Clear skies,

Paul.
14 years 9 months ago #49125

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Replied by michaeloconnell on topic Re: Great Bow here this evening!

The light in a rainbow is polarised. As you go round the circle the angle of polarisation changes. The bits that are closer to 90 degrees polarised with respect to your glasses will be almost invisible.

That make sense?

Bart.


Cool. I was thinking it was something along those lines alright. Good to have it confirmed.
Cheers,
14 years 9 months ago #49126

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Replied by pmgisme on topic Re: Great Bow here this evening!

Best rainbow image I have ever seen.

The dark lane between the bows is fascinating.
It looks like a bridge.

It brings to mind “BIFROST”, he rainbow bridge between the Earthly realm and Valhalla.
Along Bifrost Valkerie maidens rode down to Earth and collected slain Viking heros to bring them to meet Odin,Thor and Fria in Valhalla.
(To the music of Wagner, of course.)

Bifrost will be destroyed in "Ragnorak", the final Norse battle which will end the world.

Hopefully, rainbows will be with us until the end of the world!

Peter.
14 years 9 months ago #49127

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Replied by johnflannery on topic Re: Great Bow here this evening!

What a superb image Paul -- congratulations!

Atmospheric optics is one of my favourite aspects of the hobby and I have written a couple of articles on the subject for EAAS. There is another installment in the pipeline.

The articles are at at ...

www.eaas.co.uk/news/atmospheric_optics_1.html (rainbows)

and

www.eaas.co.uk/news/atmospheric_optics_2.html (halo phenomena)

Both articles have extensive links and details of books on atmospheric optics.

Peter, it's nice you have that note about Bifrost. The dark band is known as Alexander's Dark Band after a Greek philosopher who described the phenomenon almost 2,000 years ago.

All the best,

John
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14 years 9 months ago #49128

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Replied by Frank Ryan on topic Re: Great Bow here this evening!

Paul, yet another wonderful shot.
Do indeed send it to Spaceweather!
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14 years 9 months ago #49146

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