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Dragonfly's Eyes


Dragonfly's Eyes
Photo Information
Copyright: Francisco Sales (FranciscoSales) Gold Star Critiquer/Gold Note Writer [C: 113 W: 0 N: 103] (781)
Genre: Animals
Medium: Color
Date Taken: 2008-01-17
Categories: Insects
Camera: Pentax K10D, Pentax DA 50-200mm f/4-5.6 ED
Exposure: 1/180 seconds
More Photo Info: [view]
Photo Version: Original Version
Date Submitted: 2008-01-17 14:09
Viewed: 665
Points: 6
[Note Guidelines] Photographer's Note
Dragonflies
Some extinct dragonflies had wingspans of 24 inches. Even though their descendants are now smaller, they still have large compound complex eyes with very wide-angle vision to allow them to see as they fly forward and backward. Like other insects, dragonflies have to position their eyes by changing their body orientation, since their eyes do not move. Each of the dragonfly's compound eyes is made up of about 30,000 eye sensors, so they have better resolution than many other insects. The overall photoreceptor density can be about the same as humans. However, since dragonflies' eyes are much smaller than human eyes, they do not have as much overall resolution and sensitivity. Using binocular vision as humans have, dragonflies are able to estimate distance based on the distance between their eyes.
They actually use their stereo vision to determine distance as they intercept targets.

curiosidades:
As libélulas não têm a capacidade de piscar, visto que as suas mandíbulas estão adaptadas à mastigação. Dentro do seu ecossistema, são bastante úteis no controlo das populações de mosquitos e das suas outras presas, prestando assim um serviço importante ao Homem.

As libélulas adultas caçam à base do seu sentido de visão extremamente apurado. Os seus olhos são compostos por milhares de facetas (até 30.000) e conferem-lhes um campo visual de 360 graus. As libélulas medem entre 2 e 19 cm de envergadura e as espécies mais rápidas podem voar a cerca de 85 km/h.
jusninasirun, ppmiranda has marked this note useful
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Critiques [Translate]

Hello Francisco,
You have the incredible details of the eyes. The mesh was in excellent details.
Regards,
Jusni

  • Great 
  • pvs Gold Star Critiquer/Gold Star Workshop Editor/Gold Note Writer [C: 1148 W: 254 N: 2555] (11565)
  • [2008-01-18 1:21]

Hi Fracisco,

A great macro with good detail and colors,I have made as well a few of these close ups in my portfolio,always it looks quite scary to come that close,tfs

Paul

boa foto garoto, ela tava morta né? confessa!!!hehheehehhe manero....

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