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Grasshopper exoskeleton in darkfield

 
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Pau
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Joined: 20 Jan 2010
Posts: 5026
Location: Valencia, Spain

PostPosted: Sat Sep 25, 2010 10:38 am    Post subject: Grasshopper exoskeleton in darkfield Reply with quote

A grasshopper exuvia found in the garden, likely from the last moulting.
It's my first attempt to do darkfield with a so big subject (magnification aprox. 1:1.2)

EOS 20D, Apo Rodagon-D 75mm f4.5 at f5.6, Fiber optic ring light from underside. Stack of 52 images, Combine ZP Pyramid do Stack.

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Last edited by Pau on Sun Sep 26, 2010 5:21 am; edited 1 time in total
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Craig Gerard



Joined: 01 May 2010
Posts: 2877
Location: Australia

PostPosted: Sat Sep 25, 2010 6:59 pm    Post subject: Reply with quote

Pau,

Good result. Effective and appropriate lighting!

How did you support the subject over the ringlight? Did you use a glass stage plate or was the subject positioned by another method?

Craig
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morfa



Joined: 12 Oct 2009
Posts: 556
Location: Stockholm, Sweden

PostPosted: Sun Sep 26, 2010 1:55 am    Post subject: Reply with quote

Very clever technique Pau and I really like the result.

What is that dark curled up "cord" that appears to run on the inside of the excuvia?
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John Hallmén
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http://flickr.com/johnhallmen
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Pau
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Joined: 20 Jan 2010
Posts: 5026
Location: Valencia, Spain

PostPosted: Sun Sep 26, 2010 2:17 am    Post subject: Reply with quote

Many thanks for your comments.
Craig, the exuvia was held pinned at the end of its femur, out of the field of the image.
John, no idea about this cord, perhaps one of our entomologists could answer. It's inside the exuvia and with normal light is white (empty, I suppose).
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realjax



Joined: 19 May 2010
Posts: 136
Location: Netherlands

PostPosted: Sun Sep 26, 2010 12:49 pm    Post subject: Reply with quote

Great image! could the curled parts be the remains of tracheae?
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