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Snowflake

 
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rjlittlefield
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Joined: 01 Aug 2006
Posts: 17501
Location: Richland, Washington State, USA

PostPosted: Fri Jan 11, 2013 11:36 am    Post subject: Snowflake Reply with quote

We had a brief snowfall today with some well formed flakes. Here is one of them.



Shot on a board covered with ProtoStar black flocking that I keep in my freezer just for such occasions.

Canon T1i with MP-E 65 at 3X, f/11, 580 EX II flash with Opteka diffuser, auto flash exposure with minus 1-1/3 stops compensation, 4 frames handheld, Zerene Stacker PMax.

Almost all the snow is melted now. There's none at all left on the street. This particular flake and all the others captured with it simply evaporated. It's been quite a mild winter so far.

--Rik
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Ecooper



Joined: 06 Jul 2012
Posts: 217
Location: Vancouver

PostPosted: Fri Jan 11, 2013 7:31 pm    Post subject: Reply with quote

Very cool! No pun intended... Very Happy
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rjlittlefield
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Joined: 01 Aug 2006
Posts: 17501
Location: Richland, Washington State, USA

PostPosted: Sun Jan 13, 2013 10:41 am    Post subject: Reply with quote

Thanks, Ernie.

I marvel at those near-perfect specimens that the masters of snowflakes manage to capture and photograph so beautifully.

For myself, it's just interesting (and humbling!) to do one of these snapshots occasionally.

--Rik
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naturephoto1



Joined: 13 Nov 2011
Posts: 509
Location: Breinigsville, PA

PostPosted: Sun Jan 13, 2013 5:11 pm    Post subject: Reply with quote

Rik,

Very nice image.

Rich
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Richard A. Nelridge

http://www.facebook.com/RichardANelridgePhotographer
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DavefromCt



Joined: 01 Feb 2013
Posts: 13
Location: North Eastern Connecticut

PostPosted: Sat Feb 02, 2013 11:38 am    Post subject: Snowflake Reply with quote

Fantastic capture!
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rjlittlefield
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Joined: 01 Aug 2006
Posts: 17501
Location: Richland, Washington State, USA

PostPosted: Sat Feb 02, 2013 12:54 pm    Post subject: Reply with quote

Thanks for the comments, guys.

DavefromCt, welcome aboard!

To see what a master can do, look for example at Snowflakes under DIC over in the Microscope forum. Shocked

--Rik
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DavefromCt



Joined: 01 Feb 2013
Posts: 13
Location: North Eastern Connecticut

PostPosted: Sat Feb 02, 2013 2:18 pm    Post subject: Snowflake Reply with quote

Yes those were great....Ok what does DIC stand for....looks like possibly polarized light or something.
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rjlittlefield
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Joined: 01 Aug 2006
Posts: 17501
Location: Richland, Washington State, USA

PostPosted: Sat Feb 02, 2013 3:59 pm    Post subject: Reply with quote

Quote:
Ok what does DIC stand for....looks like possibly polarized light or something.

DIC stands for Differential Interference Contrast. The key concept is to turn otherwise invisible local gradients in optical path length into highly visible changes in brightness, by messing with the phase. DIC does use polarizers, but it's very different from the more common use of crossed polarizers to turn differences in optical path length into color. The crossed polarizer technique is much simpler but works only with optically active materials. DIC is much more complicated (and expensive!), but some variant of it can be made to work with almost any material.

--Rik
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