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my what big eyes you have...


my what big eyes you have...
Photo Information
Copyright: Art Roberts (Art_R) Gold Star Critiquer/Silver Workshop Editor/Gold Note Writer [C: 244 W: 20 N: 839] (3892)
Genre: Animals
Medium: Color
Date Taken: 2010-04-30
Categories: Birds
Camera: Nikon D300, AF VR-Nikkor 80-400mm ED, 77mm UV
Exposure: f/6.3, 1/250 seconds
Details: (Fill) Flash: Yes
More Photo Info: [view]
Photo Version: Original Version
Date Submitted: 2010-05-11 5:06
Viewed: 2825
Points: 10
[Note Guidelines] Photographer's Note
Hi Folks , today I have this image of a horned owl which I seen on an early morning at the last of April.

it was early enough that there as simply no image without the use of the flash , which on an owl is of coarse going to have this side effect of big glowing eyes...

the reason that this birds eyes will glow so much to a flash is because it is designed to reflect light back , this is common among animals to give them enhanced night vision , there are two types of receptors in an eye, cones , and rods , the cones see color better , and rods see lower light levels better , an owl has more of the latter. as well there is a membrane at the back of the eye which shines light back for a second pass the eye not only detects light going in , but on its way back out this is the same reason that their eyes will glow. the rest of the reason that they see so well at night is the size of their eyes , I have read that an owls eyes can occupy up to half of their skull, they also have a larger cornea to help gather in more light.

it is sometimes believed that these night creatures are not so good at seeing in the day time , and that brighter lights hurt or even blind an owl , but that is not really true , their eyes also have a very effective pupil to control the amount of light allowed in , this bird see's just fine in the day.

thanks for having a look
regards
Art

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Discussions
ThreadThread Starter Messages Updated
To mwmod99: ThanksArt_R 1 05-15 06:48
To jlinaresp: ThanksArt_R 1 05-15 06:40
To fragman: 80-400mmArt_R 1 05-11 12:11
To Nephrotome2: thanksArt_R 1 05-11 09:02
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Critiques [Translate]

striking capture, r u happy with the 80-400mm lens ? TFS Ori

Hi art,
The cornea is not fluid. It is a fibrous coat. The fluid area between cornea and lens is called "aqueous humor". Please amend your note.
Best regards
Jean-Marie

Well done Art! Impressive image of this gorgeous Owl. Some may argue about the red eye effect, but I finding that quite striking and appropriate element of the image! Bravo, Art! good job!
Regards,
George Veltchev

  • Great 
  • nagraj Gold Star Critiquer/Gold Star Workshop Editor/Gold Note Writer [C: 1618 W: 106 N: 3208] (15166)
  • [2010-05-11 7:37]

Hi,
Very brave of you to use flash to get those eyes glowing. Great bird with interesting pose. tfs.
nagraj.v

Hello Art,
Ha .. ha ... ha ... :) definitely, you are a photographer very inventive! Art friend, interesting work, very interesting! TFS, Regards, Jesús

  • Great 
  • ubc64 Gold Star Critiquer/Silver Workshop Editor/Gold Note Writer [C: 76 W: 21 N: 208] (789)
  • [2010-05-11 14:41]

Hi Art,

Whatsamatter, doesn't your camera have infra red :)? Very nice view of that owl. It looks like it's looking right through me. Good catch. TFS.

Regards,
John

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