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by **Atorie** on Sat Aug 20, 2005 12:53 am

Did anyone look at the moon tonight? There was a weird halo around the moon, I've never seen anything like it before... and no it's not lens flare It was defiantly in the sky pre capture...

Moon Halo
Camera: Nikon D70
Lens: Sigma 12-24
Focal length: 12mm
Exposure: 20s @ f/9
ISO: 320

No photoshop only raw convert and reduce for websize.

by **sirhc55** on Sat Aug 20, 2005 12:58 am

This is normally caused when high thin clouds contain millions of very small ice crystals and these act as tiny lenses. The similar elongated hexagonal shape of the crystals causes light entering one face of the crystal to exit the opposing face at a refraction of 22°

by **Nnnnsic** on Sat Aug 20, 2005 2:07 am

Whoa. I just learned something.

by **big pix** on Sat Aug 20, 2005 2:57 am

......... looks like a reflection off my 12-24 Sigma from the other side of the world......':lol:'

by **moggy** on Sat Aug 20, 2005 10:11 am

It's generally a sign that rain is on the way, not a scientific description but it seems to work. Thanks to sirhc55 for the real reason, I had often wondered what caused it.

:wink:

Bob.

by **kipper** on Sat Aug 20, 2005 10:29 am

I captured this at easter when I was down at Tower Hill. I called everyone out of the house to take a look at it

Althought just looking at my shots my moon is a tad hot. It was hard to expose correctly because my eye could clearly see the ring and the moon but trying to get a decent exposure of the ring resulted in the moon being blown. Might have to go for a dual exposure. Out of interest can you get radial graduated ND filters (inversed) so that they go from dark in the centre to light at the outer edges?

This is normally caused when high thin clouds contain millions of very small ice crystals and these act as tiny lenses. The similar elongated hexagonal shape of the crystals causes light entering one face of the crystal to exit the opposing face at a refraction of 22° Cool

*cough* nerd *cough* :lol:

by **Atorie** on Sat Aug 20, 2005 11:47 am

sirhc55 wrote:This is normally caused when high thin clouds contain millions of very small ice crystals and these act as tiny lenses. The similar elongated hexagonal shape of the crystals causes light entering one face of the crystal to exit the opposing face at a refraction of 22°

Wow.. you are so learned.

Kipper wrote:Althought just looking at my shots my moon is a tad hot. It was hard to expose correctly because my eye could clearly see the ring and the moon but trying to get a decent exposure of the ring resulted in the moon being blown. Might have to go for a dual exposure. Out of interest can you get radial graduated ND filters (inversed) so that they go from dark in the centre to light at the outer edges?

Yeah it was quite hard, I took quite a few exposures and am going to play with them today.

by **vrboy** on Sat Aug 20, 2005 12:08 pm

it is often referred to as a harvest moon, a sign for farmers that rain is coming.... not sure how true it is.
I saw one in coolum about three years ago,
harder to see in the city .

by **Atorie** on Sat Aug 20, 2005 12:11 pm

vrboy wrote:it is often referred to as a harvest moon, a sign for farmers that rain is coming....

No rain yet, or clouds for that matter.

by **Atorie** on Sat Aug 20, 2005 5:14 pm

Atorie wrote:
vrboy wrote:it is often referred to as a harvest moon, a sign for farmers that rain is coming....

No rain yet, or clouds for that matter.

Well I stand correct, after a fine start to the day the clouds have defiantly come over and are looking heavy with rain.

by **big pix** on Sat Aug 20, 2005 6:18 pm

.....this moon brings out a tune in me ..... now all together "BLUE MOON'....

by **Alpha_7** on Sun Aug 21, 2005 1:12 am

And I was always told the halo was a sign "the Fairy Queen is in trouble"
But it's nice to know the scientific reason behind it... it's those fairy's spreading ice crystal's everywhere :wink:

by **Flyer** on Sun Aug 21, 2005 10:22 am

sirhc55 wrote:This is normally caused when high thin clouds contain millions of very small ice crystals and these act as tiny lenses. The similar elongated hexagonal shape of the crystals causes light entering one face of the crystal to exit the opposing face at a refraction of 22°

Spot on Chris!

More info can be found here.

Cheers.

by **Heath Bennett** on Sun Aug 21, 2005 10:26 am

Flyer wrote:
sirhc55 wrote:This is normally caused when high thin clouds contain millions of very small ice crystals and these act as tiny lenses. The similar elongated hexagonal shape of the crystals causes light entering one face of the crystal to exit the opposing face at a refraction of 22°

Spot on Chris!
More info can be found here.

Cheers.

great find - thanks

by **gstark** on Sun Aug 21, 2005 12:54 pm

big pix wrote:.....this moon brings out a tune in me ..... now all together "BLUE MOON'....

Not this month, I'm afraid.

A blue moon is said to occur when there are two full moons that occur within th same calendar month.

by **sirhc55** on Sun Aug 21, 2005 2:15 pm

gstark wrote:
big pix wrote:.....this moon brings out a tune in me ..... now all together "BLUE MOON'....

Not this month, I'm afraid.

A blue moon is said to occur when there are two full moons that occur within th same calendar month.

Except when you have had over the quota in pinot noir :roll: