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Location: UFOUpDatesList.Com > 2012 > Aug > Aug 24

Re: 'Snowflake' Video From South America

From: Viktor Golubic <Diverge247.nul>
Date: Thu, 23 Aug 2012 21:44:53 -0400 (EDT)
Archived: Fri, 24 Aug 2012 06:50:46 -0400
Subject: Re: 'Snowflake' Video From South America

>From: Bruce Maccabee <brumac.nul>
>To: post.nul
>Date: Tue, 21 Aug 2012 12:02:13 -0400 (EDT)
>Subject: Re: 'Snowflake' Video From South America

>>From: Martin Shough <parcellular.nul>
>>To: <post.nul>
>>Date: Mon, 20 Aug 2012 12:41:39 +0100
>>Subject: 'Snowflake' Video From South America


>>Subtracting the erratic camera motion and measuring the position
>>of the light relative to the house window, I think the object
>>seems to drift slowly up and to the left over the rooftop during
>>the video. This makes me think of a bright star or planet. But
>>of course with no direction or time information to go on it's
>>hard to say.  The pattern of lights hints at some optical or
>>video artefact but I haven't seen an effect exactly like this
>>before. Any thoughts?

>I wonder if the guy videoed a bright planet using a "star
>filter" or something like that on his lens (a diffraction filter
>with three gratings that are 120 degrees apart).

>He might have used a color filter as well to make the light
>approximately monochromatic to avoid color blur that would occur
>when a diffraction filter is used with polychromatic light such
>as starlight.

>Tha latter portion of the video looks like an "emboss" version
>of the first part.  Pulsations of the image could be a
>combination of "focus hunting" by the camera and atmospheric

<If all this were to turn out to be true, then it would be a

Hi Bruce, I think this is a very good suggestion. However, every
diffraction filter I know has bilateral symmetry: Where there is
the corresponding right half identical to its left. However,
this is a seven point polygon (not even numbered) with no
bilateral reflection plane. I'm not sure any exist and even if
you attempted seven, by default it will a produce a fourteen
point pattern (even not odd like this one).

Any additional thoughts?

My only thinking is that this is a lens flare effect caused by a
thin film coating and the shape of the aperture. In that case,
the spatial distribution of the flare depends on the shape of
the aperture itself which has a seven point symmetry.


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