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The BACKSIDE of butterfly scales 10x/6x Aglais io

 
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mygale



Joined: 02 Aug 2016
Posts: 48
Location: Germany NRW

PostPosted: Wed Nov 01, 2017 9:07 am    Post subject: The BACKSIDE of butterfly scales 10x/6x Aglais io Reply with quote

The BACKSIDE of butterfly scales @10x by mygale, auf Flickr

The backside of butterfly scales @6x by mygale, auf Flickr


2017-10-31 15.47.29 by mygale, auf Flickr

Without the black light absorbing material behind the scales they are almost transparent. I found the dead butterfly outside and it was too damaged for normal macros.
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Olympusman



Joined: 15 Jan 2012
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PostPosted: Wed Nov 01, 2017 1:47 pm    Post subject: Scales Reply with quote

I don't understand the technique, but these would make wonderful large format wall art.

Mike
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Michael Reese Much FRMS EMS Bethlehem, Pennsylvania, USA
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rjlittlefield
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Joined: 01 Aug 2006
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Location: Richland, Washington State, USA

PostPosted: Wed Nov 01, 2017 2:53 pm    Post subject: Reply with quote

Very beautiful images!

As for technique, what I think I'm seeing is the ventral side of a translucent eye-spot, with the wing placed over a black background.

Based on the fact that I don't see the bases of any scales, I think I'm looking at the same surface of the scales that would be seen under normal circumstances -- the side away from the wing membrane.

At first I thought that "BACKSIDE" meant I would be seeing the surface of each scale that is normally against the wing membrane, but as I now understand the setup, that is not the case.

--Rik
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Lou Jost



Joined: 04 Sep 2015
Posts: 1888
Location: Ecuador

PostPosted: Wed Nov 01, 2017 6:00 pm    Post subject: Reply with quote

Quote:
At first I thought that "BACKSIDE" meant I would be seeing the surface of each scale that is normally against the wing membrane


I think that is indeed what we are looking at. That transparent sheet is maybe packaging tape?
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Lou Jost
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mygale



Joined: 02 Aug 2016
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Location: Germany NRW

PostPosted: Thu Nov 02, 2017 3:16 am    Post subject: Reply with quote

Quote:
I would be seeing the surface of each scale that is normally against the wing membrane


Thats the case.
Its pressed against some sticky tape, so you can see both sides.
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rjlittlefield
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PostPosted: Thu Nov 02, 2017 9:35 am    Post subject: Reply with quote

So, why can I not see the bases of the scales, where they attach to the membrane?

The first image seems to have plenty of magnification to show those, but all I see is the normal shingling, with each base hidden behind another scale.

Still puzzled...

--Rik
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Lou Jost



Joined: 04 Sep 2015
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Location: Ecuador

PostPosted: Thu Nov 02, 2017 9:40 am    Post subject: Reply with quote

No, the free ends of butterfly scales are straight or jagged. The bases are narrowed to an attachment point, and those are clearly visible in the image. The shingling is preserved, but now the bases become the outer edges.
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rjlittlefield
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PostPosted: Thu Nov 02, 2017 10:27 am    Post subject: Reply with quote

Ah, good point. And now in the first image I see a couple of isolated scales that can be seen in their entirety, with tapered base and straight free end.

What I was interpreting as free ends were the bases, just not looking like what I expected from other pictures.

Thanks for the explanation.

--Rik
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